/***** Lobxxx Translate Finished ******/
/*
 * Copyright (c) 1996, 2013, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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 */

package java.sql;

import java.math.BigDecimal;
import java.util.Calendar;
import java.io.Reader;
import java.io.InputStream;

/**
 * A table of data representing a database result set, which
 * is usually generated by executing a statement that queries the database.
 *
 * <P>A <code>ResultSet</code> object  maintains a cursor pointing
 * to its current row of data.  Initially the cursor is positioned
 * before the first row. The <code>next</code> method moves the
 * cursor to the next row, and because it returns <code>false</code>
 * when there are no more rows in the <code>ResultSet</code> object,
 * it can be used in a <code>while</code> loop to iterate through
 * the result set.
 * <P>
 * A default <code>ResultSet</code> object is not updatable and
 * has a cursor that moves forward only.  Thus, you can
 * iterate through it only once and only from the first row to the
 * last row. It is possible to
 * produce <code>ResultSet</code> objects that are scrollable and/or
 * updatable.  The following code fragment, in which <code>con</code>
 * is a valid <code>Connection</code> object, illustrates how to make
 * a result set that is scrollable and insensitive to updates by others, and
 * that is updatable. See <code>ResultSet</code> fields for other
 * options.
 * <PRE>
 *
 *       Statement stmt = con.createStatement(
 *                                      ResultSet.TYPE_SCROLL_INSENSITIVE,
 *                                      ResultSet.CONCUR_UPDATABLE);
 *       ResultSet rs = stmt.executeQuery("SELECT a, b FROM TABLE2");
 *       // rs will be scrollable, will not show changes made by others,
 *       // and will be updatable
 *
 * </PRE>
 * The <code>ResultSet</code> interface provides
 * <i>getter</i> methods (<code>getBoolean</code>, <code>getLong</code>, and so on)
 * for retrieving column values from the current row.
 * Values can be retrieved using either the index number of the
 * column or the name of the column.  In general, using the
 * column index will be more efficient.  Columns are numbered from 1.
 * For maximum portability, result set columns within each row should be
 * read in left-to-right order, and each column should be read only once.
 *
 * <P>For the getter methods, a JDBC driver attempts
 * to convert the underlying data to the Java type specified in the
 * getter method and returns a suitable Java value.  The JDBC specification
 * has a table showing the allowable mappings from SQL types to Java types
 * that can be used by the <code>ResultSet</code> getter methods.
 *
 * <P>Column names used as input to getter methods are case
 * insensitive.  When a getter method is called  with
 * a column name and several columns have the same name,
 * the value of the first matching column will be returned.
 * The column name option is
 * designed to be used when column names are used in the SQL
 * query that generated the result set.
 * For columns that are NOT explicitly named in the query, it
 * is best to use column numbers. If column names are used, the
 * programmer should take care to guarantee that they uniquely refer to
 * the intended columns, which can be assured with the SQL <i>AS</i> clause.
 * <P>
 * A set of updater methods were added to this interface
 * in the JDBC 2.0 API (Java&trade; 2 SDK,
 * Standard Edition, version 1.2). The comments regarding parameters
 * to the getter methods also apply to parameters to the
 * updater methods.
 *<P>
 * The updater methods may be used in two ways:
 * <ol>
 * <LI>to update a column value in the current row.  In a scrollable
 *     <code>ResultSet</code> object, the cursor can be moved backwards
 *     and forwards, to an absolute position, or to a position
 *     relative to the current row.
 *     The following code fragment updates the <code>NAME</code> column
 *     in the fifth row of the <code>ResultSet</code> object
 *     <code>rs</code> and then uses the method <code>updateRow</code>
 *     to update the data source table from which <code>rs</code> was derived.
 * <PRE>
 *
 *       rs.absolute(5); // moves the cursor to the fifth row of rs
 *       rs.updateString("NAME", "AINSWORTH"); // updates the
 *          // <code>NAME</code> column of row 5 to be <code>AINSWORTH</code>
 *       rs.updateRow(); // updates the row in the data source
 *
 * </PRE>
 * <LI>to insert column values into the insert row.  An updatable
 *     <code>ResultSet</code> object has a special row associated with
 *     it that serves as a staging area for building a row to be inserted.
 *     The following code fragment moves the cursor to the insert row, builds
 *     a three-column row, and inserts it into <code>rs</code> and into
 *     the data source table using the method <code>insertRow</code>.
 * <PRE>
 *
 *       rs.moveToInsertRow(); // moves cursor to the insert row
 *       rs.updateString(1, "AINSWORTH"); // updates the
 *          // first column of the insert row to be <code>AINSWORTH</code>
 *       rs.updateInt(2,35); // updates the second column to be <code>35</code>
 *       rs.updateBoolean(3, true); // updates the third column to <code>true</code>
 *       rs.insertRow();
 *       rs.moveToCurrentRow();
 *
 * </PRE>
 * </ol>
 * <P>A <code>ResultSet</code> object is automatically closed when the
 * <code>Statement</code> object that
 * generated it is closed, re-executed, or used
 * to retrieve the next result from a sequence of multiple results.
 *
 * <P>The number, types and properties of a <code>ResultSet</code>
 * object's columns are provided by the <code>ResultSetMetaData</code>
 * object returned by the <code>ResultSet.getMetaData</code> method.
 *
 * <p>
 *  表示数据库结果集的数据表,通常通过执行查询数据库的语句生成
 * 
 *  <p> <code> ResultSet </code>对象维护一个指向其当前数据行的游标初始时光标位于第一行之前<code> next </code>方法将光标移动到下一行,并且因为当<code> 
 * ResultSet </code>对象中没有更多行时,它返回<code> false </code>,所以可以在<code> while </code>组。
 * <P>
 * 默认的<code> ResultSet </code>对象是不可更新的,并且只有一个向前移动的游标。因此,你只能迭代一次,只能从第一行到最后一行。
 * 可以生成<code> ResultSet </code>可滚动和/或可更新的对象下面的代码片段,其中<code> con </code>是一个有效的<code> Connection </code>对象
 * ,说明如何使一个可滚动的结果集并且对其他人的更新不敏感,并且可更新请参阅<code> ResultSet </code>字段以获取其他选项。
 * 默认的<code> ResultSet </code>对象是不可更新的,并且只有一个向前移动的游标。因此,你只能迭代一次,只能从第一行到最后一行。
 * <PRE>
 * 
 * 语句stmt = concreateStatement(ResultSetTYPE_SCROLL_INSENSITIVE,ResultSetCONCUR_UPDATABLE); ResultSet rs
 *  = stmtexecuteQuery("SELECT a,b FROM TABLE2"); // rs将可滚动,不会显示其他人所做的更改,//将可更新。
 * 
 * </PRE>
 *  <code> ResultSet </code>接口提供<i> getter </i>方法(<code> getBoolean </code>,<code> getLong </code>,等等)行可
 * 以使用列的索引号或列名称检索值通常,使用列索引将更有效列为了最大可移植性,每行内的结果集列应在左侧读取右到右的顺序,每列应该只读一次。
 * 
 * <P>对于getter方法,JDBC驱动程序会尝试将底层数据转换为getter方法中指定的Java类型,并返回一个合适的Java值。
 * JDBC规范有一个表,显示了从SQL类型到Java类型的可允许映射由<code> ResultSet </code> getter方法使用。
 * 
 * <P>用作getter方法的输入的列名不区分大小当使用列名称调用getter方法并且多个列具有相同的名称时,将返回第一个匹配列的值。
 * 列名选项设计为用于在生成结果集的SQL查询中使用列名对于在查询中未显式命名的列,最好使用列号如果使用列名,程序员应注意确保它们唯一引用到预期的列,这可以通过SQL <i> AS </i>子句保证。
 * <P>
 * 在JDBC 20 API(Java&trade; 2 SDK,Standard Edition,version 12)中,一组更新器方法被添加到此接口。
 * 关于getter方法的参数的注释也适用于updater方法的参数。
 * P>
 *  updater方法可以以两种方式使用：
 * <ol>
 *  <LI>更新当前行中的列值在可滚动的<code> ResultSet </code>对象中,光标可以向前和向后移动到绝对位置或相对于当前行的位置。
 * 代码片段更新<code> ResultSet </code>对象<code> rs </code>第五行中的<code> NAME </code>列,然后使用方法<code> updateRow </code>
 * 更新从其派生<code> rs </code>的数据源表。
 *  <LI>更新当前行中的列值在可滚动的<code> ResultSet </code>对象中,光标可以向前和向后移动到绝对位置或相对于当前行的位置。
 * <PRE>
 * 
 * rsabsolute(5); //将光标移动到rs的第五行rsupdateString("NAME","AINSWORTH"); //将第5行的// <code> NAME </code>列更新为<code>
 *  AINSWORTH </code> rsupdateRow(); //更新数据源中的行。
 * 
 * </PRE>
 *  <LI>在插入行中插入列值可更新的<code> ResultSet </code>对象有一个特殊的行,用作构建要插入行的暂存区域以下代码段将光标移动到插入行,构建三列行,并使用方法<code> ins
 * ertRow </code>将其插入到<code> rs </code>。
 * <PRE>
 * 
 * rsmoveToInsertRow(); //将光标移动到插入行rsupdateString(1,"AINSWORTH"); //将插入行的第一列更新为<code> AINSWORTH </code> 
 * rsupdateInt(2,35); //将第二列更新为<code> 35 </code> rsupdateBoolean(3,true); //将第三列更新为<code> true </code> r
 * sinsertRow(); rsmoveToCurrentRow();。
 * 
 * </PRE>
 * </ol>
 *  <P>当生成它的<code> Statement </code>对象被关闭,重新执行或用于从多个结果序列中检索下一个结果时,<code> ResultSet </code>对象会自动关闭
 * 
 *  <code> ResultSet </code>对象的列的数量,类型和属性由<code> ResultSetgetMetaData </code>方法返回的<code> ResultSetMetaDa
 * ta </code>对象提供。
 * 
 * 
 * @see Statement#executeQuery
 * @see Statement#getResultSet
 * @see ResultSetMetaData
 */

public interface ResultSet extends Wrapper, AutoCloseable {

    /**
     * Moves the cursor forward one row from its current position.
     * A <code>ResultSet</code> cursor is initially positioned
     * before the first row; the first call to the method
     * <code>next</code> makes the first row the current row; the
     * second call makes the second row the current row, and so on.
     * <p>
     * When a call to the <code>next</code> method returns <code>false</code>,
     * the cursor is positioned after the last row. Any
     * invocation of a <code>ResultSet</code> method which requires a
     * current row will result in a <code>SQLException</code> being thrown.
     *  If the result set type is <code>TYPE_FORWARD_ONLY</code>, it is vendor specified
     * whether their JDBC driver implementation will return <code>false</code> or
     *  throw an <code>SQLException</code> on a
     * subsequent call to <code>next</code>.
     *
     * <P>If an input stream is open for the current row, a call
     * to the method <code>next</code> will
     * implicitly close it. A <code>ResultSet</code> object's
     * warning chain is cleared when a new row is read.
     *
     * <p>
     * 将光标从当前位置向前移动一行A <code> ResultSet </code>光标最初位于第一行之前;第一次调用<code> next </code>方法使第一行成为当前行;第二个调用使第二行成为当前
     * 行,依此类推。
     * <p>
     *  当调用<code> next </code>方法返回<code> false </code>时,游标位于最后一行之后任何调用需要当前行的<code> ResultSet </code>将导致抛出<code>
     *  SQLException </code>如果结果集类型是<code> TYPE_FORWARD_ONLY </code>,则它是供应商指定他们的JDBC驱动程序实现是否将返回<code> false 
     * </code>对<code> next </code>的后续调用的<code> SQLException </code>。
     * 
     * <P>如果为当前行打开了一个输入流,则调用<code> next </code>方法将隐式关闭它。当一个新行被删除时,<code> ResultSet </code>读
     * 
     * 
     * @return <code>true</code> if the new current row is valid;
     * <code>false</code> if there are no more rows
     * @exception SQLException if a database access error occurs or this method is
     *            called on a closed result set
     */
    boolean next() throws SQLException;


    /**
     * Releases this <code>ResultSet</code> object's database and
     * JDBC resources immediately instead of waiting for
     * this to happen when it is automatically closed.
     *
     * <P>The closing of a <code>ResultSet</code> object does <strong>not</strong> close the <code>Blob</code>,
     * <code>Clob</code> or <code>NClob</code> objects created by the <code>ResultSet</code>. <code>Blob</code>,
     * <code>Clob</code> or <code>NClob</code> objects remain valid for at least the duration of the
     * transaction in which they are created, unless their <code>free</code> method is invoked.
     *<p>
     * When a <code>ResultSet</code> is closed, any <code>ResultSetMetaData</code>
     * instances that were created by calling the  <code>getMetaData</code>
     * method remain accessible.
     *
     * <P><B>Note:</B> A <code>ResultSet</code> object
     * is automatically closed by the
     * <code>Statement</code> object that generated it when
     * that <code>Statement</code> object is closed,
     * re-executed, or is used to retrieve the next result from a
     * sequence of multiple results.
     *<p>
     * Calling the method <code>close</code> on a <code>ResultSet</code>
     * object that is already closed is a no-op.
     *
     *
     * <p>
     *  立即释放此<code> ResultSet </code>对象的数据库和JDBC资源,而不是在自动关闭时等待此情况发生
     * 
     *  <p> <code> ResultSet </code>对象的关闭<strong>不</strong>关闭<code> Blob </code>,<code> Clob </code>由<code> 
     * ResultSet </code> <code> Blob </code>,<code> Clob </code>或<code> NClob </code>对象创建的/ code>对象至少持续有效创建它
     * 们的事务,除非调用它们的<code> free </code>方法。
     * p>
     * 当<code> ResultSet </code>关闭时,通过调用<code> getMetaData </code>方法创建的任何<code> ResultSetMetaData </code>实例仍
     * 然可访问。
     * 
     *  <p> <b>注意</b>：<code> Statement </code>对象会自动关闭<code> Statement </code>被关闭,重新执行或用于从多个结果的序列中检索下一个结果
     * p>
     *  调用已经关闭的<code> ResultSet </code>对象上的<code> close </code>方法是一个无操作
     * 
     * 
     * @exception SQLException if a database access error occurs
     */
    void close() throws SQLException;

    /**
     * Reports whether
     * the last column read had a value of SQL <code>NULL</code>.
     * Note that you must first call one of the getter methods
     * on a column to try to read its value and then call
     * the method <code>wasNull</code> to see if the value read was
     * SQL <code>NULL</code>.
     *
     * <p>
     * 报告最后一列的值是否为SQL <code> NULL </code>请注意,您必须首先调用列上的一个getter方法来尝试读取其值,然后调用方法<code> wasNull < code>以查看读取的值
     * 是否为SQL <code> NULL </code>。
     * 
     * 
     * @return <code>true</code> if the last column value read was SQL
     *         <code>NULL</code> and <code>false</code> otherwise
     * @exception SQLException if a database access error occurs or this method is
     *            called on a closed result set
     */
    boolean wasNull() throws SQLException;

    // Methods for accessing results by column index

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>String</code> in the Java programming language.
     *
     * <p>
     *  将这个<code> ResultSet </code>对象的当前行中的指定列的值作为Java编程语言中的<code> String </code>
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>null</code>
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     */
    String getString(int columnIndex) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>boolean</code> in the Java programming language.
     *
     * <P>If the designated column has a datatype of CHAR or VARCHAR
     * and contains a "0" or has a datatype of BIT, TINYINT, SMALLINT, INTEGER or BIGINT
     * and contains  a 0, a value of <code>false</code> is returned.  If the designated column has a datatype
     * of CHAR or VARCHAR
     * and contains a "1" or has a datatype of BIT, TINYINT, SMALLINT, INTEGER or BIGINT
     * and contains  a 1, a value of <code>true</code> is returned.
     *
     * <p>
     *  在Java编程语言中将此<code> ResultSet </code>对象的当前行中的指定列的值检索为<code> boolean </code>
     * 
     * <P>如果指定列的数据类型为CHAR或VARCHAR,并且包含"0"或具有BIT,TINYINT,SMALLINT,INTEGER或BIGINT的数据类型,并且包含0,值为<code> false </code>
     * 如果指定的列具有CHAR或VARCHAR的数据类型,并且包含"1"或具有BIT,TINYINT,SMALLINT,INTEGER或BIGINT的数据类型,并且包含1,则<code> true </code>
     * 的值为回。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>false</code>
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     */
    boolean getBoolean(int columnIndex) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>byte</code> in the Java programming language.
     *
     * <p>
     *  将这个<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> byte </code>
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>0</code>
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     */
    byte getByte(int columnIndex) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>short</code> in the Java programming language.
     *
     * <p>
     *  将这个<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> short </code>
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>0</code>
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     */
    short getShort(int columnIndex) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * an <code>int</code> in the Java programming language.
     *
     * <p>
     * 将这个<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> int </code>
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>0</code>
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     */
    int getInt(int columnIndex) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>long</code> in the Java programming language.
     *
     * <p>
     *  将这个<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> long </code>
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>0</code>
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     */
    long getLong(int columnIndex) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>float</code> in the Java programming language.
     *
     * <p>
     *  将这个<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> float </code>
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>0</code>
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     */
    float getFloat(int columnIndex) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>double</code> in the Java programming language.
     *
     * <p>
     *  将这个<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> double </code>
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>0</code>
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     */
    double getDouble(int columnIndex) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>java.sql.BigDecimal</code> in the Java programming language.
     *
     * <p>
     * 将Java代码中的<code> ResultSet </code>对象的当前行中的指定列的值检索为Java代码中的<code> javasqlBigDecimal </code>
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param scale the number of digits to the right of the decimal point
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>null</code>
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @deprecated Use {@code getBigDecimal(int columnIndex)}
     *             or {@code getBigDecimal(String columnLabel)}
     */
    @Deprecated
    BigDecimal getBigDecimal(int columnIndex, int scale) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>byte</code> array in the Java programming language.
     * The bytes represent the raw values returned by the driver.
     *
     * <p>
     *  将此<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> byte </code>数组字节表示驱动程序返回的原始值
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>null</code>
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     */
    byte[] getBytes(int columnIndex) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>java.sql.Date</code> object in the Java programming language.
     *
     * <p>
     *  将这个<code> ResultSet </code>对象的当前行中的指定列的值作为Java编程语言中的<code> javasqlDate </code>对象
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>null</code>
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     */
    java.sql.Date getDate(int columnIndex) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>java.sql.Time</code> object in the Java programming language.
     *
     * <p>
     *  将此<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> javasqlTime </code>对象
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>null</code>
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     */
    java.sql.Time getTime(int columnIndex) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>java.sql.Timestamp</code> object in the Java programming language.
     *
     * <p>
     * 将这个<code> ResultSet </code>对象的当前行中的指定列的值作为Java编程语言中的<code> javasqlTimestamp </code>对象
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>null</code>
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     */
    java.sql.Timestamp getTimestamp(int columnIndex) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a stream of ASCII characters. The value can then be read in chunks from the
     * stream. This method is particularly
     * suitable for retrieving large <code>LONGVARCHAR</code> values.
     * The JDBC driver will
     * do any necessary conversion from the database format into ASCII.
     *
     * <P><B>Note:</B> All the data in the returned stream must be
     * read prior to getting the value of any other column. The next
     * call to a getter method implicitly closes the stream.  Also, a
     * stream may return <code>0</code> when the method
     * <code>InputStream.available</code>
     * is called whether there is data available or not.
     *
     * <p>
     *  将此<code> ResultSet </code>对象的当前行中的指定列的值检索为ASCII字符流可以从流中读取该块的方法此方法特别适用于检索大型<code> LONGVARCHAR </code>
     * 值JDBC驱动程序将执行从数据库格式到ASCII的任何必要的转换。
     * 
     * <P> <B>注意：</B>返回流中的所有数据必须在获取任何其他列的值之前读取下一个对getter方法的调用隐式关闭流另外,流可能返回<code > 0 </code>当方法<code> InputSt
     * reamavailable </code>被调用时是否有可用的数据。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @return a Java input stream that delivers the database column value
     * as a stream of one-byte ASCII characters;
     * if the value is SQL <code>NULL</code>, the
     * value returned is <code>null</code>
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     */
    java.io.InputStream getAsciiStream(int columnIndex) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * as a stream of two-byte 3 characters. The first byte is
     * the high byte; the second byte is the low byte.
     *
     * The value can then be read in chunks from the
     * stream. This method is particularly
     * suitable for retrieving large <code>LONGVARCHAR</code>values.  The
     * JDBC driver will do any necessary conversion from the database
     * format into Unicode.
     *
     * <P><B>Note:</B> All the data in the returned stream must be
     * read prior to getting the value of any other column. The next
     * call to a getter method implicitly closes the stream.
     * Also, a stream may return <code>0</code> when the method
     * <code>InputStream.available</code>
     * is called, whether there is data available or not.
     *
     * <p>
     *  将<code> ResultSet </code>对象的当前行中的指定列的值检索为两个字节的3个字符流第一个字节是高字节;第二个字节是低字节
     * 
     *  然后可以从流中读取该块的值此方法特别适合检索大的<code> LONGVARCHAR </code>值JDBC驱动程序将执行从数据库格式到Unicode的任何必要的转换
     * 
     * <P> <B>注意：</B>返回流中的所有数据必须在获取任何其他列的值之前读取下一个对getter方法的调用隐式关闭流另外,流可能返回<code > 0 </code>当方法<code> InputSt
     * reamavailable </code>被调用时,是否有数据可用。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @return a Java input stream that delivers the database column value
     *         as a stream of two-byte Unicode characters;
     *         if the value is SQL <code>NULL</code>, the value returned is
     *         <code>null</code>
     *
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @deprecated use <code>getCharacterStream</code> in place of
     *              <code>getUnicodeStream</code>
     */
    @Deprecated
    java.io.InputStream getUnicodeStream(int columnIndex) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as a  stream of
     * uninterpreted bytes. The value can then be read in chunks from the
     * stream. This method is particularly
     * suitable for retrieving large <code>LONGVARBINARY</code> values.
     *
     * <P><B>Note:</B> All the data in the returned stream must be
     * read prior to getting the value of any other column. The next
     * call to a getter method implicitly closes the stream.  Also, a
     * stream may return <code>0</code> when the method
     * <code>InputStream.available</code>
     * is called whether there is data available or not.
     *
     * <p>
     *  将此<code> ResultSet </code>对象的当前行中指定列的值检索为未解释字节流然后可以从流中读取该块的方法此方法特别适用于检索大型<code> LONGVARBINARY </code>
     * 值。
     * 
     * <P> <B>注意：</B>返回流中的所有数据必须在获取任何其他列的值之前读取下一个对getter方法的调用隐式关闭流另外,流可能返回<code > 0 </code>当方法<code> InputSt
     * reamavailable </code>被调用时是否有可用的数据。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @return a Java input stream that delivers the database column value
     *         as a stream of uninterpreted bytes;
     *         if the value is SQL <code>NULL</code>, the value returned is
     *         <code>null</code>
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     */
    java.io.InputStream getBinaryStream(int columnIndex)
        throws SQLException;


    // Methods for accessing results by column label

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>String</code> in the Java programming language.
     *
     * <p>
     *  将这个<code> ResultSet </code>对象的当前行中的指定列的值作为Java编程语言中的<code> String </code>
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>null</code>
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     */
    String getString(String columnLabel) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>boolean</code> in the Java programming language.
     *
     * <P>If the designated column has a datatype of CHAR or VARCHAR
     * and contains a "0" or has a datatype of BIT, TINYINT, SMALLINT, INTEGER or BIGINT
     * and contains  a 0, a value of <code>false</code> is returned.  If the designated column has a datatype
     * of CHAR or VARCHAR
     * and contains a "1" or has a datatype of BIT, TINYINT, SMALLINT, INTEGER or BIGINT
     * and contains  a 1, a value of <code>true</code> is returned.
     *
     * <p>
     *  在Java编程语言中将此<code> ResultSet </code>对象的当前行中的指定列的值检索为<code> boolean </code>
     * 
     * <P>如果指定列的数据类型为CHAR或VARCHAR,并且包含"0"或具有BIT,TINYINT,SMALLINT,INTEGER或BIGINT的数据类型,并且包含0,值为<code> false </code>
     * 如果指定的列具有CHAR或VARCHAR的数据类型,并且包含"1"或具有BIT,TINYINT,SMALLINT,INTEGER或BIGINT的数据类型,并且包含1,则<code> true </code>
     * 的值为回。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>false</code>
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     */
    boolean getBoolean(String columnLabel) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>byte</code> in the Java programming language.
     *
     * <p>
     *  将这个<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> byte </code>
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>0</code>
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     */
    byte getByte(String columnLabel) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>short</code> in the Java programming language.
     *
     * <p>
     *  将这个<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> short </code>
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>0</code>
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     */
    short getShort(String columnLabel) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * an <code>int</code> in the Java programming language.
     *
     * <p>
     * 将这个<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> int </code>
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>0</code>
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     */
    int getInt(String columnLabel) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>long</code> in the Java programming language.
     *
     * <p>
     *  将这个<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> long </code>
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>0</code>
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     */
    long getLong(String columnLabel) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>float</code> in the Java programming language.
     *
     * <p>
     *  将这个<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> float </code>
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>0</code>
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     */
    float getFloat(String columnLabel) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>double</code> in the Java programming language.
     *
     * <p>
     *  将这个<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> double </code>
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>0</code>
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     */
    double getDouble(String columnLabel) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>java.math.BigDecimal</code> in the Java programming language.
     *
     * <p>
     * 将这个<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> javamathBigDecimal </code>
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param scale the number of digits to the right of the decimal point
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>null</code>
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @deprecated Use {@code getBigDecimal(int columnIndex)}
     *             or {@code getBigDecimal(String columnLabel)}
     */
    @Deprecated
    BigDecimal getBigDecimal(String columnLabel, int scale) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>byte</code> array in the Java programming language.
     * The bytes represent the raw values returned by the driver.
     *
     * <p>
     *  将此<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> byte </code>数组字节表示驱动程序返回的原始值
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>null</code>
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     */
    byte[] getBytes(String columnLabel) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>java.sql.Date</code> object in the Java programming language.
     *
     * <p>
     *  将这个<code> ResultSet </code>对象的当前行中的指定列的值作为Java编程语言中的<code> javasqlDate </code>对象
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>null</code>
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     */
    java.sql.Date getDate(String columnLabel) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>java.sql.Time</code> object in the Java programming language.
     *
     * <p>
     *  将此<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> javasqlTime </code>对象
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @return the column value;
     * if the value is SQL <code>NULL</code>,
     * the value returned is <code>null</code>
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     */
    java.sql.Time getTime(String columnLabel) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>java.sql.Timestamp</code> object in the Java programming language.
     *
     * <p>
     * 将这个<code> ResultSet </code>对象的当前行中的指定列的值作为Java编程语言中的<code> javasqlTimestamp </code>对象
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>null</code>
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     */
    java.sql.Timestamp getTimestamp(String columnLabel) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as a stream of
     * ASCII characters. The value can then be read in chunks from the
     * stream. This method is particularly
     * suitable for retrieving large <code>LONGVARCHAR</code> values.
     * The JDBC driver will
     * do any necessary conversion from the database format into ASCII.
     *
     * <P><B>Note:</B> All the data in the returned stream must be
     * read prior to getting the value of any other column. The next
     * call to a getter method implicitly closes the stream. Also, a
     * stream may return <code>0</code> when the method <code>available</code>
     * is called whether there is data available or not.
     *
     * <p>
     *  将此<code> ResultSet </code>对象的当前行中的指定列的值检索为ASCII字符流可以从流中读取该块的方法此方法特别适用于检索大型<code> LONGVARCHAR </code>
     * 值JDBC驱动程序将执行从数据库格式到ASCII的任何必要的转换。
     * 
     * <P> <B>注意：</B>返回流中的所有数据必须在获取任何其他列的值之前读取下一个对getter方法的调用隐式关闭流另外,流可能返回<code > 0 </code>当方法<code>可用</code>
     * 被调用时是否有可用的数据。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @return a Java input stream that delivers the database column value
     * as a stream of one-byte ASCII characters.
     * If the value is SQL <code>NULL</code>,
     * the value returned is <code>null</code>.
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     */
    java.io.InputStream getAsciiStream(String columnLabel) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as a stream of two-byte
     * Unicode characters. The first byte is the high byte; the second
     * byte is the low byte.
     *
     * The value can then be read in chunks from the
     * stream. This method is particularly
     * suitable for retrieving large <code>LONGVARCHAR</code> values.
     * The JDBC technology-enabled driver will
     * do any necessary conversion from the database format into Unicode.
     *
     * <P><B>Note:</B> All the data in the returned stream must be
     * read prior to getting the value of any other column. The next
     * call to a getter method implicitly closes the stream.
     * Also, a stream may return <code>0</code> when the method
     * <code>InputStream.available</code> is called, whether there
     * is data available or not.
     *
     * <p>
     *  将此<code> ResultSet </code>对象的当前行中的指定列的值检索为两字节Unicode字符流第一个字节是高字节;第二个字节是低字节
     * 
     *  然后可以从流中读取该块的值此方法特别适合检索大的<code> LONGVARCHAR </code>值JDBC技术启用的驱动程序将执行从数据库格式到Unicode的所有必要转换
     * 
     * <P> <B>注意：</B>返回流中的所有数据必须在获取任何其他列的值之前读取下一个对getter方法的调用隐式关闭流另外,流可能返回<code > 0 </code>当方法<code> InputSt
     * reamavailable </code>被调用时,是否有数据可用。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @return a Java input stream that delivers the database column value
     *         as a stream of two-byte Unicode characters.
     *         If the value is SQL <code>NULL</code>, the value returned
     *         is <code>null</code>.
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @deprecated use <code>getCharacterStream</code> instead
     */
    @Deprecated
    java.io.InputStream getUnicodeStream(String columnLabel) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as a stream of uninterpreted
     * <code>byte</code>s.
     * The value can then be read in chunks from the
     * stream. This method is particularly
     * suitable for retrieving large <code>LONGVARBINARY</code>
     * values.
     *
     * <P><B>Note:</B> All the data in the returned stream must be
     * read prior to getting the value of any other column. The next
     * call to a getter method implicitly closes the stream. Also, a
     * stream may return <code>0</code> when the method <code>available</code>
     * is called whether there is data available or not.
     *
     * <p>
     *  将此<code> ResultSet </code>对象的当前行中指定列的值检索为未解释的<code> byte </code> s值然后可以从流中读取该块的方法此方法特别适合于检索大的<code> 
     * LONGVARBINARY </code>值。
     * 
     * <P> <B>注意：</B>返回流中的所有数据必须在获取任何其他列的值之前读取下一个对getter方法的调用隐式关闭流另外,流可能返回<code > 0 </code>当方法<code>可用</code>
     * 被调用时是否有可用的数据。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @return a Java input stream that delivers the database column value
     * as a stream of uninterpreted bytes;
     * if the value is SQL <code>NULL</code>, the result is <code>null</code>
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     */
    java.io.InputStream getBinaryStream(String columnLabel)
        throws SQLException;


    // Advanced features:

    /**
     * Retrieves the first warning reported by calls on this
     * <code>ResultSet</code> object.
     * Subsequent warnings on this <code>ResultSet</code> object
     * will be chained to the <code>SQLWarning</code> object that
     * this method returns.
     *
     * <P>The warning chain is automatically cleared each time a new
     * row is read.  This method may not be called on a <code>ResultSet</code>
     * object that has been closed; doing so will cause an
     * <code>SQLException</code> to be thrown.
     * <P>
     * <B>Note:</B> This warning chain only covers warnings caused
     * by <code>ResultSet</code> methods.  Any warning caused by
     * <code>Statement</code> methods
     * (such as reading OUT parameters) will be chained on the
     * <code>Statement</code> object.
     *
     * <p>
     *  检索此<code> ResultSet </code>对象上调用所报告的第一个警告此<code> ResultSet </code>对象上的后续警告将链接到此方法返回的<code> SQLWarnin
     * g </code>对象。
     * 
     *  <P>警告链会在每次读取新行时自动清除此方法可能无法在已关闭的<code> ResultSet </code>对象上调用;这样做会导致抛出<code> SQLException </code>
     * <P>
     * <B>注意：</B>此警告链仅涵盖由<code> ResultSet </code>方法引起的警告由<code> Statement </code>方法引起的任何警告(例如读取OUT参数) <code>
     *  Statement </code>对象。
     * 
     * 
     * @return the first <code>SQLWarning</code> object reported or
     *         <code>null</code> if there are none
     * @exception SQLException if a database access error occurs or this method is
     *            called on a closed result set
     */
    SQLWarning getWarnings() throws SQLException;

    /**
     * Clears all warnings reported on this <code>ResultSet</code> object.
     * After this method is called, the method <code>getWarnings</code>
     * returns <code>null</code> until a new warning is
     * reported for this <code>ResultSet</code> object.
     *
     * <p>
     *  清除此<code> ResultSet </code>对象上报告的所有警告在调用此方法后,方法<code> getWarnings </code>返回<code> null </code>,直到为此<code >
     *  ResultSet </code>对象。
     * 
     * 
     * @exception SQLException if a database access error occurs or this method is
     *            called on a closed result set
     */
    void clearWarnings() throws SQLException;

    /**
     * Retrieves the name of the SQL cursor used by this <code>ResultSet</code>
     * object.
     *
     * <P>In SQL, a result table is retrieved through a cursor that is
     * named. The current row of a result set can be updated or deleted
     * using a positioned update/delete statement that references the
     * cursor name. To insure that the cursor has the proper isolation
     * level to support update, the cursor's <code>SELECT</code> statement
     * should be of the form <code>SELECT FOR UPDATE</code>. If
     * <code>FOR UPDATE</code> is omitted, the positioned updates may fail.
     *
     * <P>The JDBC API supports this SQL feature by providing the name of the
     * SQL cursor used by a <code>ResultSet</code> object.
     * The current row of a <code>ResultSet</code> object
     * is also the current row of this SQL cursor.
     *
     * <p>
     *  检索此<code> ResultSet </code>对象使用的SQL游标的名称
     * 
     * <P>在SQL中,通过名为的游标检索结果表可以使用定位的引用游标名称的update / delete语句更新或删除结果集的当前行为了确保游标具有正确的隔离级别支持更新,光标的<code> SELECT 
     * </code>语句应该是<code> SELECT FOR UPDATE </code>的形式如果省略<code> FOR UPDATE </code>,定位的更新可能会失败。
     * 
     *  <P> JDBC API通过提供由<code> ResultSet </code>对象使用的SQL游标的名称来支持此SQL特性<code> ResultSet </code>对象的当前行也是当前行这个
     * SQL游标。
     * 
     * 
     * @return the SQL name for this <code>ResultSet</code> object's cursor
     * @exception SQLException if a database access error occurs or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     */
    String getCursorName() throws SQLException;

    /**
     * Retrieves the  number, types and properties of
     * this <code>ResultSet</code> object's columns.
     *
     * <p>
     *  检索此<code> ResultSet </code>对象的列的数量,类型和属性
     * 
     * 
     * @return the description of this <code>ResultSet</code> object's columns
     * @exception SQLException if a database access error occurs or this method is
     *            called on a closed result set
     */
    ResultSetMetaData getMetaData() throws SQLException;

    /**
     * <p>Gets the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * an <code>Object</code> in the Java programming language.
     *
     * <p>This method will return the value of the given column as a
     * Java object.  The type of the Java object will be the default
     * Java object type corresponding to the column's SQL type,
     * following the mapping for built-in types specified in the JDBC
     * specification. If the value is an SQL <code>NULL</code>,
     * the driver returns a Java <code>null</code>.
     *
     * <p>This method may also be used to read database-specific
     * abstract data types.
     *
     * In the JDBC 2.0 API, the behavior of method
     * <code>getObject</code> is extended to materialize
     * data of SQL user-defined types.
     * <p>
     * If <code>Connection.getTypeMap</code> does not throw a
     * <code>SQLFeatureNotSupportedException</code>,
     * then when a column contains a structured or distinct value,
     * the behavior of this method is as
     * if it were a call to: <code>getObject(columnIndex,
     * this.getStatement().getConnection().getTypeMap())</code>.
     *
     * If <code>Connection.getTypeMap</code> does throw a
     * <code>SQLFeatureNotSupportedException</code>,
     * then structured values are not supported, and distinct values
     * are mapped to the default Java class as determined by the
     * underlying SQL type of the DISTINCT type.
     *
     * <p>
     * <p>将此<code> ResultSet </code>对象的当前行中的指定列的值作为Java编程语言中的<code> Object </code>
     * 
     *  <p>此方法将返回给定列的值作为Java对象Java对象的类型将是对应于列的SQL类型的默认Java对象类型,跟在JDBC规范中指定的内置类型的映射之后如果值为SQL <code> NULL </code>
     * ,则驱动程序返回Java <code> null </code>。
     * 
     *  <p>此方法也可用于读取特定于数据库的抽象数据类型
     * 
     *  在JDBC 20 API中,方法<code> getObject </code>的行为被扩展以实现SQL用户定义类型的数据
     * <p>
     * 如果<code> ConnectiongetTypeMap </code>没有抛出<code> SQLFeatureNotSupportedException </code>,那么当列包含结构化或不同的
     * 值时,此方法的行为就像是调用：<code> getObject(columnIndex,thisgetStatement()getConnection()getTypeMap())</code>。
     * 
     *  如果<code> ConnectiongetTypeMap </code>确实引发了一个<code> SQLFeatureNotSupportedException </code>,则不支持结构化值,
     * 并且不同的值映射到由DISTINCT类型的底层SQL类型确定的默认Java类。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @return a <code>java.lang.Object</code> holding the column value
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     */
    Object getObject(int columnIndex) throws SQLException;

    /**
     * <p>Gets the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * an <code>Object</code> in the Java programming language.
     *
     * <p>This method will return the value of the given column as a
     * Java object.  The type of the Java object will be the default
     * Java object type corresponding to the column's SQL type,
     * following the mapping for built-in types specified in the JDBC
     * specification. If the value is an SQL <code>NULL</code>,
     * the driver returns a Java <code>null</code>.
     * <P>
     * This method may also be used to read database-specific
     * abstract data types.
     * <P>
     * In the JDBC 2.0 API, the behavior of the method
     * <code>getObject</code> is extended to materialize
     * data of SQL user-defined types.  When a column contains
     * a structured or distinct value, the behavior of this method is as
     * if it were a call to: <code>getObject(columnIndex,
     * this.getStatement().getConnection().getTypeMap())</code>.
     *
     * <p>
     *  <p>将此<code> ResultSet </code>对象的当前行中的指定列的值作为Java编程语言中的<code> Object </code>
     * 
     * <p>此方法将返回给定列的值作为Java对象Java对象的类型将是对应于列的SQL类型的默认Java对象类型,跟在JDBC规范中指定的内置类型的映射之后如果值为SQL <code> NULL </code>
     * ,则驱动程序返回Java <code> null </code>。
     * <P>
     *  此方法也可用于读取特定于数据库的抽象数据类型
     * <P>
     *  在JDBC 20 API中,方法<code> getObject </code>的行为被扩展为实现SQL用户定义类型的数据当列包含结构化或不同的值时,此方法的行为好像是调用：<code> getObj
     * ect(columnIndex,thisgetStatement()getConnection()getTypeMap())</code>。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @return a <code>java.lang.Object</code> holding the column value
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     */
    Object getObject(String columnLabel) throws SQLException;

    //----------------------------------------------------------------

    /**
     * Maps the given <code>ResultSet</code> column label to its
     * <code>ResultSet</code> column index.
     *
     * <p>
     * 将给定的<code> ResultSet </code>列标签映射到其<code> ResultSet </code>列索引
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @return the column index of the given column name
     * @exception SQLException if the <code>ResultSet</code> object
     * does not contain a column labeled <code>columnLabel</code>, a database access error occurs
     *  or this method is called on a closed result set
     */
    int findColumn(String columnLabel) throws SQLException;


    //--------------------------JDBC 2.0-----------------------------------

    //---------------------------------------------------------------------
    // Getters and Setters
    //---------------------------------------------------------------------

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as a
     * <code>java.io.Reader</code> object.
     * <p>
     *  将此<code> ResultSet </code>对象的当前行中的指定列的值检索为<code> javaioReader </code>对象
     * 
     * 
     * @return a <code>java.io.Reader</code> object that contains the column
     * value; if the value is SQL <code>NULL</code>, the value returned is
     * <code>null</code> in the Java programming language.
     * @param columnIndex the first column is 1, the second is 2, ...
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     * @since 1.2
     */
    java.io.Reader getCharacterStream(int columnIndex) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as a
     * <code>java.io.Reader</code> object.
     *
     * <p>
     *  将此<code> ResultSet </code>对象的当前行中的指定列的值检索为<code> javaioReader </code>对象
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @return a <code>java.io.Reader</code> object that contains the column
     * value; if the value is SQL <code>NULL</code>, the value returned is
     * <code>null</code> in the Java programming language
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     * @since 1.2
     */
    java.io.Reader getCharacterStream(String columnLabel) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as a
     * <code>java.math.BigDecimal</code> with full precision.
     *
     * <p>
     *  将这个<code> ResultSet </code>对象的当前行中的指定列的值检索为具有完全精度的<code> javamathBigDecimal </code>
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @return the column value (full precision);
     * if the value is SQL <code>NULL</code>, the value returned is
     * <code>null</code> in the Java programming language.
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     * @since 1.2
     */
    BigDecimal getBigDecimal(int columnIndex) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as a
     * <code>java.math.BigDecimal</code> with full precision.
     *
     * <p>
     *  将这个<code> ResultSet </code>对象的当前行中的指定列的值检索为具有完全精度的<code> javamathBigDecimal </code>
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @return the column value (full precision);
     * if the value is SQL <code>NULL</code>, the value returned is
     * <code>null</code> in the Java programming language.
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs or this method is
     *            called on a closed result set
     * @since 1.2
     *
     */
    BigDecimal getBigDecimal(String columnLabel) throws SQLException;

    //---------------------------------------------------------------------
    // Traversal/Positioning
    //---------------------------------------------------------------------

    /**
     * Retrieves whether the cursor is before the first row in
     * this <code>ResultSet</code> object.
     * <p>
     * <strong>Note:</strong>Support for the <code>isBeforeFirst</code> method
     * is optional for <code>ResultSet</code>s with a result
     * set type of <code>TYPE_FORWARD_ONLY</code>
     *
     * <p>
     * 检索游标是否在此<code> ResultSet </code>对象中的第一行之前
     * <p>
     *  <strong>注意</strong>：<code> isBeforeFirst </code>方法对<code> ResultSet </code>的可选属性,结果集类型为<code> TYPE_F
     * ORWARD_ONLY </code>。
     * 
     * 
     * @return <code>true</code> if the cursor is before the first row;
     * <code>false</code> if the cursor is at any other position or the
     * result set contains no rows
     * @exception SQLException if a database access error occurs or this method is
     *            called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    boolean isBeforeFirst() throws SQLException;

    /**
     * Retrieves whether the cursor is after the last row in
     * this <code>ResultSet</code> object.
     * <p>
     * <strong>Note:</strong>Support for the <code>isAfterLast</code> method
     * is optional for <code>ResultSet</code>s with a result
     * set type of <code>TYPE_FORWARD_ONLY</code>
     *
     * <p>
     *  检索游标是否在此<code> ResultSet </code>对象中的最后一行之后
     * <p>
     *  <strong>注意</strong>：<code> isAfterLast </code>方法支持<code> ResultSet </code>的可选操作,结果集类型为<code> TYPE_FO
     * RWARD_ONLY </code>。
     * 
     * 
     * @return <code>true</code> if the cursor is after the last row;
     * <code>false</code> if the cursor is at any other position or the
     * result set contains no rows
     * @exception SQLException if a database access error occurs or this method is
     *            called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    boolean isAfterLast() throws SQLException;

    /**
     * Retrieves whether the cursor is on the first row of
     * this <code>ResultSet</code> object.
     * <p>
     * <strong>Note:</strong>Support for the <code>isFirst</code> method
     * is optional for <code>ResultSet</code>s with a result
     * set type of <code>TYPE_FORWARD_ONLY</code>
     *
     * <p>
     *  检索游标是否在此<code> ResultSet </code>对象的第一行
     * <p>
     *  <strong>注意</strong>：<code> isFirst </code>方法对<code> ResultSet </code>的可选属性,结果集类型为<code> TYPE_FORWARD
     * _ONLY </code>。
     * 
     * 
     * @return <code>true</code> if the cursor is on the first row;
     * <code>false</code> otherwise
     * @exception SQLException if a database access error occurs or this method is
     *            called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    boolean isFirst() throws SQLException;

    /**
     * Retrieves whether the cursor is on the last row of
     * this <code>ResultSet</code> object.
     *  <strong>Note:</strong> Calling the method <code>isLast</code> may be expensive
     * because the JDBC driver
     * might need to fetch ahead one row in order to determine
     * whether the current row is the last row in the result set.
     * <p>
     * <strong>Note:</strong> Support for the <code>isLast</code> method
     * is optional for <code>ResultSet</code>s with a result
     * set type of <code>TYPE_FORWARD_ONLY</code>
     * <p>
     * 检索游标是否位于<code> ResultSet </code>对象的最后一行<strong>注意</strong>：调用<code> isLast </code>方法可能很昂贵,因为JDBC驱动程序可
     * 能需要提前一行,以确定当前行是否是结果集中的最后一行。
     * <p>
     *  <strong>注意</strong>：<code> isLast </code>方法对<code> ResultSet </code>的可选属性,结果集类型为<code> TYPE_FORWARD_
     * ONLY </code>。
     * 
     * 
     * @return <code>true</code> if the cursor is on the last row;
     * <code>false</code> otherwise
     * @exception SQLException if a database access error occurs or this method is
     *            called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    boolean isLast() throws SQLException;

    /**
     * Moves the cursor to the front of
     * this <code>ResultSet</code> object, just before the
     * first row. This method has no effect if the result set contains no rows.
     *
     * <p>
     *  将光标移动到此<code> ResultSet </code>对象的前面,就在第一行之前如果结果集不包含行,此方法不起作用
     * 
     * 
     * @exception SQLException if a database access error
     * occurs; this method is called on a closed result set or the
     * result set type is <code>TYPE_FORWARD_ONLY</code>
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void beforeFirst() throws SQLException;

    /**
     * Moves the cursor to the end of
     * this <code>ResultSet</code> object, just after the
     * last row. This method has no effect if the result set contains no rows.
     * <p>
     *  将光标移动到此<code> ResultSet </code>对象的末尾,紧接在最后一行之后如果结果集不包含行,此方法不起作用
     * 
     * 
     * @exception SQLException if a database access error
     * occurs; this method is called on a closed result set
     * or the result set type is <code>TYPE_FORWARD_ONLY</code>
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void afterLast() throws SQLException;

    /**
     * Moves the cursor to the first row in
     * this <code>ResultSet</code> object.
     *
     * <p>
     * 将光标移动到此<code> ResultSet </code>对象中的第一行
     * 
     * 
     * @return <code>true</code> if the cursor is on a valid row;
     * <code>false</code> if there are no rows in the result set
     * @exception SQLException if a database access error
     * occurs; this method is called on a closed result set
     * or the result set type is <code>TYPE_FORWARD_ONLY</code>
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    boolean first() throws SQLException;

    /**
     * Moves the cursor to the last row in
     * this <code>ResultSet</code> object.
     *
     * <p>
     *  将光标移动到此<code> ResultSet </code>对象中的最后一行
     * 
     * 
     * @return <code>true</code> if the cursor is on a valid row;
     * <code>false</code> if there are no rows in the result set
     * @exception SQLException if a database access error
     * occurs; this method is called on a closed result set
     * or the result set type is <code>TYPE_FORWARD_ONLY</code>
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    boolean last() throws SQLException;

    /**
     * Retrieves the current row number.  The first row is number 1, the
     * second number 2, and so on.
     * <p>
     * <strong>Note:</strong>Support for the <code>getRow</code> method
     * is optional for <code>ResultSet</code>s with a result
     * set type of <code>TYPE_FORWARD_ONLY</code>
     *
     * <p>
     *  检索当前行号第一行是数字1,第二个数字是2,依此类推
     * <p>
     *  <strong>注意</strong>：<code> getRow </code>方法对<code> ResultSet </code>的可选属性,结果集类型为<code> TYPE_FORWARD_
     * ONLY </code>。
     * 
     * 
     * @return the current row number; <code>0</code> if there is no current row
     * @exception SQLException if a database access error occurs
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    int getRow() throws SQLException;

    /**
     * Moves the cursor to the given row number in
     * this <code>ResultSet</code> object.
     *
     * <p>If the row number is positive, the cursor moves to
     * the given row number with respect to the
     * beginning of the result set.  The first row is row 1, the second
     * is row 2, and so on.
     *
     * <p>If the given row number is negative, the cursor moves to
     * an absolute row position with respect to
     * the end of the result set.  For example, calling the method
     * <code>absolute(-1)</code> positions the
     * cursor on the last row; calling the method <code>absolute(-2)</code>
     * moves the cursor to the next-to-last row, and so on.
     *
     * <p>If the row number specified is zero, the cursor is moved to
     * before the first row.
     *
     * <p>An attempt to position the cursor beyond the first/last row in
     * the result set leaves the cursor before the first row or after
     * the last row.
     *
     * <p><B>Note:</B> Calling <code>absolute(1)</code> is the same
     * as calling <code>first()</code>. Calling <code>absolute(-1)</code>
     * is the same as calling <code>last()</code>.
     *
     * <p>
     *  将光标移动到此<code> ResultSet </code>对象中的给定行号
     * 
     *  <p>如果行号为正,光标将移动到相对于结果集开头的给定行号第一行是第1行,第二行是第2行,依此类推
     * 
     * <p>如果给定的行号为负,光标将移动到相对于结果集结束的绝对行位置。
     * 例如,调用方法<code> absolute(-1)</code>最后一行;调用方法<code> absolute(-2)</code>将光标移动到倒数第二行,依此类推。
     * 
     *  <p>如果指定的行号为零,则光标将移动到第一行之前
     * 
     *  <p>尝试将光标定位在结果集中的第一行/最后一行之前,将光标停留在第一行之前或最后一行之后
     * 
     *  </p> </b>注意：</b>调用<code> absolute(1)</code> code>与调用<code> last()</code>相同
     * 
     * 
     * @param row the number of the row to which the cursor should move.
     *        A value of zero indicates that the cursor will be positioned
     *        before the first row; a positive number indicates the row number
     *        counting from the beginning of the result set; a negative number
     *        indicates the row number counting from the end of the result set
     * @return <code>true</code> if the cursor is moved to a position in this
     * <code>ResultSet</code> object;
     * <code>false</code> if the cursor is before the first row or after the
     * last row
     * @exception SQLException if a database access error
     * occurs; this method is called on a closed result set
     * or the result set type is <code>TYPE_FORWARD_ONLY</code>
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    boolean absolute( int row ) throws SQLException;

    /**
     * Moves the cursor a relative number of rows, either positive or negative.
     * Attempting to move beyond the first/last row in the
     * result set positions the cursor before/after the
     * the first/last row. Calling <code>relative(0)</code> is valid, but does
     * not change the cursor position.
     *
     * <p>Note: Calling the method <code>relative(1)</code>
     * is identical to calling the method <code>next()</code> and
     * calling the method <code>relative(-1)</code> is identical
     * to calling the method <code>previous()</code>.
     *
     * <p>
     * 将光标移动相对行数,正或负尝试移动超出结果集中的第一行/最后一行将光标置于第一行/最后一行之前/之后调用<code> relative(0)</code>有效,但不改变光标位置
     * 
     *  <p>注意：调用方法<code> relative(1)</code>与调用<code> next()</code>方法相同, >与调用方法<code> previous()</code>相同
     * 
     * 
     * @param rows an <code>int</code> specifying the number of rows to
     *        move from the current row; a positive number moves the cursor
     *        forward; a negative number moves the cursor backward
     * @return <code>true</code> if the cursor is on a row;
     *         <code>false</code> otherwise
     * @exception SQLException if a database access error occurs;  this method
     * is called on a closed result set or the result set type is
     *            <code>TYPE_FORWARD_ONLY</code>
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    boolean relative( int rows ) throws SQLException;

    /**
     * Moves the cursor to the previous row in this
     * <code>ResultSet</code> object.
     *<p>
     * When a call to the <code>previous</code> method returns <code>false</code>,
     * the cursor is positioned before the first row.  Any invocation of a
     * <code>ResultSet</code> method which requires a current row will result in a
     * <code>SQLException</code> being thrown.
     *<p>
     * If an input stream is open for the current row, a call to the method
     * <code>previous</code> will implicitly close it.  A <code>ResultSet</code>
     *  object's warning change is cleared when a new row is read.
     *<p>
     *
     * <p>
     *  将光标移动到此<code> ResultSet </code>对象中的上一行
     * p>
     * 当调用<code> previous </code>方法返回<code> false </code>时,游标位于第一行之前。
     * 任何调用需要当前行的<code> ResultSet </code>将导致抛出<code> SQLException </code>。
     * p>
     *  如果为当前行打开输入流,则对<code> previous </code>方法的调用将隐式关闭它。当读取新行时,会清除<code> ResultSet </code>对象的警告更改
     * p>
     * 
     * 
     * @return <code>true</code> if the cursor is now positioned on a valid row;
     * <code>false</code> if the cursor is positioned before the first row
     * @exception SQLException if a database access error
     * occurs; this method is called on a closed result set
     * or the result set type is <code>TYPE_FORWARD_ONLY</code>
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    boolean previous() throws SQLException;

    //---------------------------------------------------------------------
    // Properties
    //---------------------------------------------------------------------

    /**
     * The constant indicating that the rows in a result set will be
     * processed in a forward direction; first-to-last.
     * This constant is used by the method <code>setFetchDirection</code>
     * as a hint to the driver, which the driver may ignore.
     * <p>
     *  常量,指示将以正向方向处理结果集中的行; first-to-last这个常量被方法<code> setFetchDirection </code>用作驱动程序的提示,驱动程序可能忽略它
     * 
     * 
     * @since 1.2
     */
    int FETCH_FORWARD = 1000;

    /**
     * The constant indicating that the rows in a result set will be
     * processed in a reverse direction; last-to-first.
     * This constant is used by the method <code>setFetchDirection</code>
     * as a hint to the driver, which the driver may ignore.
     * <p>
     * 常量,指示结果集中的行将按相反方向处理; last-to-first此常量由方法<code> setFetchDirection </code>用作驱动程序的提示,驱动程序可能会忽略此提示
     * 
     * 
     * @since 1.2
     */
    int FETCH_REVERSE = 1001;

    /**
     * The constant indicating that the order in which rows in a
     * result set will be processed is unknown.
     * This constant is used by the method <code>setFetchDirection</code>
     * as a hint to the driver, which the driver may ignore.
     * <p>
     *  指示结果集中的行将被处理的顺序的常量未知此常量由方法<code> setFetchDirection </code>用作驱动程序的提示,驱动程序可能会忽略此提示
     * 
     */
    int FETCH_UNKNOWN = 1002;

    /**
     * Gives a hint as to the direction in which the rows in this
     * <code>ResultSet</code> object will be processed.
     * The initial value is determined by the
     * <code>Statement</code> object
     * that produced this <code>ResultSet</code> object.
     * The fetch direction may be changed at any time.
     *
     * <p>
     *  提供对这个<code> ResultSet </code>对象中的行进行处理的方向的提示初始值由生成此<code> ResultSet </code>对象的<code> Statement </code>
     *  code> object获取方向可以随时更改。
     * 
     * 
     * @param direction an <code>int</code> specifying the suggested
     *        fetch direction; one of <code>ResultSet.FETCH_FORWARD</code>,
     *        <code>ResultSet.FETCH_REVERSE</code>, or
     *        <code>ResultSet.FETCH_UNKNOWN</code>
     * @exception SQLException if a database access error occurs; this
     * method is called on a closed result set or
     * the result set type is <code>TYPE_FORWARD_ONLY</code> and the fetch
     * direction is not <code>FETCH_FORWARD</code>
     * @since 1.2
     * @see Statement#setFetchDirection
     * @see #getFetchDirection
     */
    void setFetchDirection(int direction) throws SQLException;

    /**
     * Retrieves the fetch direction for this
     * <code>ResultSet</code> object.
     *
     * <p>
     *  检索此<code> ResultSet </code>对象的提取方向
     * 
     * 
     * @return the current fetch direction for this <code>ResultSet</code> object
     * @exception SQLException if a database access error occurs
     * or this method is called on a closed result set
     * @since 1.2
     * @see #setFetchDirection
     */
    int getFetchDirection() throws SQLException;

    /**
     * Gives the JDBC driver a hint as to the number of rows that should
     * be fetched from the database when more rows are needed for this
     * <code>ResultSet</code> object.
     * If the fetch size specified is zero, the JDBC driver
     * ignores the value and is free to make its own best guess as to what
     * the fetch size should be.  The default value is set by the
     * <code>Statement</code> object
     * that created the result set.  The fetch size may be changed at any time.
     *
     * <p>
     * 为JDBC驱动程序提供有关此<code> ResultSet </code>对象需要更多行时应从数据库中提取的行数的提示如果指定的提取大小为零,JDBC驱动程序将忽略该值,可以自由地做出自己的最佳猜测,
     * 获取大小应该是什么默认值由创建结果集的<code> Statement </code>对象设置fetch size可以随时更改。
     * 
     * 
     * @param rows the number of rows to fetch
     * @exception SQLException if a database access error occurs; this method
     * is called on a closed result set or the
     * condition {@code rows >= 0} is not satisfied
     * @since 1.2
     * @see #getFetchSize
     */
    void setFetchSize(int rows) throws SQLException;

    /**
     * Retrieves the fetch size for this
     * <code>ResultSet</code> object.
     *
     * <p>
     *  检索此<code> ResultSet </code>对象的提取大小
     * 
     * 
     * @return the current fetch size for this <code>ResultSet</code> object
     * @exception SQLException if a database access error occurs
     * or this method is called on a closed result set
     * @since 1.2
     * @see #setFetchSize
     */
    int getFetchSize() throws SQLException;

    /**
     * The constant indicating the type for a <code>ResultSet</code> object
     * whose cursor may move only forward.
     * <p>
     *  常量,指示<code> ResultSet </code>对象的类型,其游标只能向前移动
     * 
     * 
     * @since 1.2
     */
    int TYPE_FORWARD_ONLY = 1003;

    /**
     * The constant indicating the type for a <code>ResultSet</code> object
     * that is scrollable but generally not sensitive to changes to the data
     * that underlies the <code>ResultSet</code>.
     * <p>
     *  常量指示可滚动的<code> ResultSet </code>对象的类型,但通常对<code> ResultSet </code>下面的数据的更改不敏感
     * 
     * 
     * @since 1.2
     */
    int TYPE_SCROLL_INSENSITIVE = 1004;

    /**
     * The constant indicating the type for a <code>ResultSet</code> object
     * that is scrollable and generally sensitive to changes to the data
     * that underlies the <code>ResultSet</code>.
     * <p>
     * 常量指示一个<code> ResultSet </code>对象的类型,该对象是可滚动的,通常对<code> ResultSet </code>下面的数据的更改敏感,
     * 
     * 
     * @since 1.2
     */
    int TYPE_SCROLL_SENSITIVE = 1005;

    /**
     * Retrieves the type of this <code>ResultSet</code> object.
     * The type is determined by the <code>Statement</code> object
     * that created the result set.
     *
     * <p>
     *  检索此<code> ResultSet </code>对象的类型该类型由创建结果集的<code> Statement </code>对象确定
     * 
     * 
     * @return <code>ResultSet.TYPE_FORWARD_ONLY</code>,
     *         <code>ResultSet.TYPE_SCROLL_INSENSITIVE</code>,
     *         or <code>ResultSet.TYPE_SCROLL_SENSITIVE</code>
     * @exception SQLException if a database access error occurs
     * or this method is called on a closed result set
     * @since 1.2
     */
    int getType() throws SQLException;

    /**
     * The constant indicating the concurrency mode for a
     * <code>ResultSet</code> object that may NOT be updated.
     * <p>
     *  该常数指示可能不被更新的<code> ResultSet </code>对象的并发模式
     * 
     * 
     * @since 1.2
     */
    int CONCUR_READ_ONLY = 1007;

    /**
     * The constant indicating the concurrency mode for a
     * <code>ResultSet</code> object that may be updated.
     * <p>
     *  该常数指示可以更新的<code> ResultSet </code>对象的并发模式
     * 
     * 
     * @since 1.2
     */
    int CONCUR_UPDATABLE = 1008;

    /**
     * Retrieves the concurrency mode of this <code>ResultSet</code> object.
     * The concurrency used is determined by the
     * <code>Statement</code> object that created the result set.
     *
     * <p>
     *  检索此<code> ResultSet </code>对象的并发模式所使用的并发性由创建结果集的<code> Statement </code>对象确定
     * 
     * 
     * @return the concurrency type, either
     *         <code>ResultSet.CONCUR_READ_ONLY</code>
     *         or <code>ResultSet.CONCUR_UPDATABLE</code>
     * @exception SQLException if a database access error occurs
     * or this method is called on a closed result set
     * @since 1.2
     */
    int getConcurrency() throws SQLException;

    //---------------------------------------------------------------------
    // Updates
    //---------------------------------------------------------------------

    /**
     * Retrieves whether the current row has been updated.  The value returned
     * depends on whether or not the result set can detect updates.
     * <p>
     * <strong>Note:</strong> Support for the <code>rowUpdated</code> method is optional with a result set
     * concurrency of <code>CONCUR_READ_ONLY</code>
     * <p>
     * 检索当前行是否已更新返回的值取决于结果集是否可以检测更新
     * <p>
     *  <strong>注意</strong>：<code> rowUpdated </code>方法的支持是可选的,结果集的并发性<code> CONCUR_READ_ONLY </code>
     * 
     * 
     * @return <code>true</code> if the current row is detected to
     * have been visibly updated by the owner or another; <code>false</code> otherwise
     * @exception SQLException if a database access error occurs
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @see DatabaseMetaData#updatesAreDetected
     * @since 1.2
     */
    boolean rowUpdated() throws SQLException;

    /**
     * Retrieves whether the current row has had an insertion.
     * The value returned depends on whether or not this
     * <code>ResultSet</code> object can detect visible inserts.
     * <p>
     * <strong>Note:</strong> Support for the <code>rowInserted</code> method is optional with a result set
     * concurrency of <code>CONCUR_READ_ONLY</code>
     * <p>
     *  检索当前行是否有插入返回的值取决于此<code> ResultSet </code>对象是否可以检测可见插入
     * <p>
     *  <strong>注意</strong>：<code> rowInserted </code>方法的支持是可选的,结果集的并发性<code> CONCUR_READ_ONLY </code>
     * 
     * 
     * @return <code>true</code> if the current row is detected to
     * have been inserted; <code>false</code> otherwise
     * @exception SQLException if a database access error occurs
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     *
     * @see DatabaseMetaData#insertsAreDetected
     * @since 1.2
     */
    boolean rowInserted() throws SQLException;

    /**
     * Retrieves whether a row has been deleted.  A deleted row may leave
     * a visible "hole" in a result set.  This method can be used to
     * detect holes in a result set.  The value returned depends on whether
     * or not this <code>ResultSet</code> object can detect deletions.
     * <p>
     * <strong>Note:</strong> Support for the <code>rowDeleted</code> method is optional with a result set
     * concurrency of <code>CONCUR_READ_ONLY</code>
     * <p>
     * 检索行是否已删除已删除的行可能在结果集中留下可见的"空洞"此方法可用于检测结果集中的空洞返回的值取决于此<code> ResultSet </code>对象可以检测删除
     * <p>
     *  <strong>注意</strong>：<code> rowDeleted </code>方法的支持是可选的,结果集的并发性<code> CONCUR_READ_ONLY </code>
     * 
     * 
     * @return <code>true</code> if the current row is detected to
     * have been deleted by the owner or another; <code>false</code> otherwise
     * @exception SQLException if a database access error occurs
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     *
     * @see DatabaseMetaData#deletesAreDetected
     * @since 1.2
     */
    boolean rowDeleted() throws SQLException;

    /**
     * Updates the designated column with a <code>null</code> value.
     *
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code>
     * or <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用<code> null </code>值更新指定的列
     * 
     *  updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新
     * 数据库。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateNull(int columnIndex) throws SQLException;

    /**
     * Updates the designated column with a <code>boolean</code> value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     * 使用<code> boolean </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>
     * 或<code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param x the new column value
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateBoolean(int columnIndex, boolean x) throws SQLException;

    /**
     * Updates the designated column with a <code>byte</code> value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     *
     * <p>
     *  使用<code> byte </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>或
     * <code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param x the new column value
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateByte(int columnIndex, byte x) throws SQLException;

    /**
     * Updates the designated column with a <code>short</code> value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     * 使用<code> short </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>或
     * <code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param x the new column value
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateShort(int columnIndex, short x) throws SQLException;

    /**
     * Updates the designated column with an <code>int</code> value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用<code> int </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>或<code>
     *  insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param x the new column value
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateInt(int columnIndex, int x) throws SQLException;

    /**
     * Updates the designated column with a <code>long</code> value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     * 使用<code> long </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>或<code>
     *  insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param x the new column value
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateLong(int columnIndex, long x) throws SQLException;

    /**
     * Updates the designated column with a <code>float</code> value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用<code> float </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>
     * 或<code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param x the new column value
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateFloat(int columnIndex, float x) throws SQLException;

    /**
     * Updates the designated column with a <code>double</code> value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     * 使用<code> double </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>
     * 或<code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param x the new column value
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateDouble(int columnIndex, double x) throws SQLException;

    /**
     * Updates the designated column with a <code>java.math.BigDecimal</code>
     * value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用<code> javamathBigDecimal </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updat
     * eRow </code>或<code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param x the new column value
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateBigDecimal(int columnIndex, BigDecimal x) throws SQLException;

    /**
     * Updates the designated column with a <code>String</code> value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     * 使用<code> String </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>
     * 或<code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param x the new column value
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateString(int columnIndex, String x) throws SQLException;

    /**
     * Updates the designated column with a <code>byte</code> array value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用<code> byte </code>数组值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>
     * 或<code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param x the new column value
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateBytes(int columnIndex, byte x[]) throws SQLException;

    /**
     * Updates the designated column with a <code>java.sql.Date</code> value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     * 使用<code> javasqlDate </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>
     * 或<code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param x the new column value
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateDate(int columnIndex, java.sql.Date x) throws SQLException;

    /**
     * Updates the designated column with a <code>java.sql.Time</code> value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用<code> javasqlTime </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>
     * 或<code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param x the new column value
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateTime(int columnIndex, java.sql.Time x) throws SQLException;

    /**
     * Updates the designated column with a <code>java.sql.Timestamp</code>
     * value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     * 使用<code> javasqlTimestamp </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateR
     * ow </code>或<code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param x the new column value
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateTimestamp(int columnIndex, java.sql.Timestamp x)
      throws SQLException;

    /**
     * Updates the designated column with an ascii stream value, which will have
     * the specified number of bytes.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用ascii流值更新指定的列,该值将具有指定的字节数updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>或<code>
     *  insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param x the new column value
     * @param length the length of the stream
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateAsciiStream(int columnIndex,
                           java.io.InputStream x,
                           int length) throws SQLException;

    /**
     * Updates the designated column with a binary stream value, which will have
     * the specified number of bytes.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     * 使用具有指定字节数的二进制流值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>或<code> i
     * nsertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param x the new column value
     * @param length the length of the stream
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateBinaryStream(int columnIndex,
                            java.io.InputStream x,
                            int length) throws SQLException;

    /**
     * Updates the designated column with a character stream value, which will have
     * the specified number of bytes.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用具有指定字节数的字符流值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>或<code> i
     * nsertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param x the new column value
     * @param length the length of the stream
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateCharacterStream(int columnIndex,
                             java.io.Reader x,
                             int length) throws SQLException;

    /**
     * Updates the designated column with an <code>Object</code> value.
     *
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *<p>
     * If the second argument is an <code>InputStream</code> then the stream must contain
     * the number of bytes specified by scaleOrLength.  If the second argument is a
     * <code>Reader</code> then the reader must contain the number of characters specified
     * by scaleOrLength. If these conditions are not true the driver will generate a
     * <code>SQLException</code> when the statement is executed.
     *
     * <p>
     *  使用<code> Object </code>值更新指定的列
     * 
     * updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新数
     * 据库。
     * p>
     *  如果第二个参数是<code> InputStream </code>,那么流必须包含由scaleOrLength指定的字节数。
     * 如果第二个参数是<code> Reader </code>,则读者必须包含指定的字符数by scaleOrLength如果这些条件不为真,驱动程序将在执行语句时生成<code> SQLException
     *  </code>。
     *  如果第二个参数是<code> InputStream </code>,那么流必须包含由scaleOrLength指定的字节数。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param x the new column value
     * @param scaleOrLength for an object of <code>java.math.BigDecimal</code> ,
     *          this is the number of digits after the decimal point. For
     *          Java Object types <code>InputStream</code> and <code>Reader</code>,
     *          this is the length
     *          of the data in the stream or reader.  For all other types,
     *          this value will be ignored.
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateObject(int columnIndex, Object x, int scaleOrLength)
      throws SQLException;

    /**
     * Updates the designated column with an <code>Object</code> value.
     *
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用<code> Object </code>值更新指定的列
     * 
     * updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新数
     * 据库。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param x the new column value
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateObject(int columnIndex, Object x) throws SQLException;

    /**
     * Updates the designated column with a <code>null</code> value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用<code> null </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>或
     * <code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateNull(String columnLabel) throws SQLException;

    /**
     * Updates the designated column with a <code>boolean</code> value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     * 使用<code> boolean </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>
     * 或<code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param x the new column value
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateBoolean(String columnLabel, boolean x) throws SQLException;

    /**
     * Updates the designated column with a <code>byte</code> value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用<code> byte </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>或
     * <code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param x the new column value
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateByte(String columnLabel, byte x) throws SQLException;

    /**
     * Updates the designated column with a <code>short</code> value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     * 使用<code> short </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>或
     * <code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param x the new column value
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateShort(String columnLabel, short x) throws SQLException;

    /**
     * Updates the designated column with an <code>int</code> value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用<code> int </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>或<code>
     *  insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param x the new column value
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateInt(String columnLabel, int x) throws SQLException;

    /**
     * Updates the designated column with a <code>long</code> value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     * 使用<code> long </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>或<code>
     *  insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param x the new column value
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateLong(String columnLabel, long x) throws SQLException;

    /**
     * Updates the designated column with a <code>float </code> value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用<code> float </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>
     * 或<code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param x the new column value
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateFloat(String columnLabel, float x) throws SQLException;

    /**
     * Updates the designated column with a <code>double</code> value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     * 使用<code> double </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>
     * 或<code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param x the new column value
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateDouble(String columnLabel, double x) throws SQLException;

    /**
     * Updates the designated column with a <code>java.sql.BigDecimal</code>
     * value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用<code> javasqlBigDecimal </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> update
     * Row </code>或<code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param x the new column value
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateBigDecimal(String columnLabel, BigDecimal x) throws SQLException;

    /**
     * Updates the designated column with a <code>String</code> value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     * 使用<code> String </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>
     * 或<code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param x the new column value
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateString(String columnLabel, String x) throws SQLException;

    /**
     * Updates the designated column with a byte array value.
     *
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code>
     * or <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用字节数组值更新指定的列
     * 
     *  updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新
     * 数据库。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param x the new column value
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateBytes(String columnLabel, byte x[]) throws SQLException;

    /**
     * Updates the designated column with a <code>java.sql.Date</code> value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     * 使用<code> javasqlDate </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>
     * 或<code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param x the new column value
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateDate(String columnLabel, java.sql.Date x) throws SQLException;

    /**
     * Updates the designated column with a <code>java.sql.Time</code> value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用<code> javasqlTime </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>
     * 或<code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param x the new column value
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateTime(String columnLabel, java.sql.Time x) throws SQLException;

    /**
     * Updates the designated column with a <code>java.sql.Timestamp</code>
     * value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     * 使用<code> javasqlTimestamp </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateR
     * ow </code>或<code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param x the new column value
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateTimestamp(String columnLabel, java.sql.Timestamp x)
      throws SQLException;

    /**
     * Updates the designated column with an ascii stream value, which will have
     * the specified number of bytes.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用ascii流值更新指定的列,该值将具有指定的字节数updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>或<code>
     *  insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param x the new column value
     * @param length the length of the stream
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateAsciiStream(String columnLabel,
                           java.io.InputStream x,
                           int length) throws SQLException;

    /**
     * Updates the designated column with a binary stream value, which will have
     * the specified number of bytes.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     * 使用具有指定字节数的二进制流值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>或<code> i
     * nsertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param x the new column value
     * @param length the length of the stream
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateBinaryStream(String columnLabel,
                            java.io.InputStream x,
                            int length) throws SQLException;

    /**
     * Updates the designated column with a character stream value, which will have
     * the specified number of bytes.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用具有指定字节数的字符流值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>或<code> i
     * nsertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param reader the <code>java.io.Reader</code> object containing
     *        the new column value
     * @param length the length of the stream
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateCharacterStream(String columnLabel,
                             java.io.Reader reader,
                             int length) throws SQLException;

    /**
     * Updates the designated column with an <code>Object</code> value.
     *
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *<p>
     * If the second argument is an <code>InputStream</code> then the stream must contain
     * the number of bytes specified by scaleOrLength.  If the second argument is a
     * <code>Reader</code> then the reader must contain the number of characters specified
     * by scaleOrLength. If these conditions are not true the driver will generate a
     * <code>SQLException</code> when the statement is executed.
     *
     * <p>
     *  使用<code> Object </code>值更新指定的列
     * 
     * updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新数
     * 据库。
     * p>
     *  如果第二个参数是<code> InputStream </code>,那么流必须包含由scaleOrLength指定的字节数。
     * 如果第二个参数是<code> Reader </code>,则读者必须包含指定的字符数by scaleOrLength如果这些条件不为真,驱动程序将在执行语句时生成<code> SQLException
     *  </code>。
     *  如果第二个参数是<code> InputStream </code>,那么流必须包含由scaleOrLength指定的字节数。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param x the new column value
     * @param scaleOrLength for an object of <code>java.math.BigDecimal</code> ,
     *          this is the number of digits after the decimal point. For
     *          Java Object types <code>InputStream</code> and <code>Reader</code>,
     *          this is the length
     *          of the data in the stream or reader.  For all other types,
     *          this value will be ignored.
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateObject(String columnLabel, Object x, int scaleOrLength)
      throws SQLException;

    /**
     * Updates the designated column with an <code>Object</code> value.
     *
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用<code> Object </code>值更新指定的列
     * 
     * updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新数
     * 据库。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param x the new column value
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateObject(String columnLabel, Object x) throws SQLException;

    /**
     * Inserts the contents of the insert row into this
     * <code>ResultSet</code> object and into the database.
     * The cursor must be on the insert row when this method is called.
     *
     * <p>
     *  将插入行的内容插入到此<code> ResultSet </code>对象和数据库中当此方法被调用时,游标必须在插入行
     * 
     * 
     * @exception SQLException if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>,
     * this method is called on a closed result set,
     * if this method is called when the cursor is not on the insert row,
     * or if not all of non-nullable columns in
     * the insert row have been given a non-null value
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void insertRow() throws SQLException;

    /**
     * Updates the underlying database with the new contents of the
     * current row of this <code>ResultSet</code> object.
     * This method cannot be called when the cursor is on the insert row.
     *
     * <p>
     *  使用此<code> ResultSet </code>对象的当前行的新内容更新基础数据库此方法不能在游标位于插入行上时调用
     * 
     * 
     * @exception SQLException if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>;
     *  this method is called on a closed result set or
     * if this method is called when the cursor is on the insert row
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void updateRow() throws SQLException;

    /**
     * Deletes the current row from this <code>ResultSet</code> object
     * and from the underlying database.  This method cannot be called when
     * the cursor is on the insert row.
     *
     * <p>
     *  从此<code> ResultSet </code>对象和底层数据库中删除当前行当游标在插入行上时,此方法不能被调用
     * 
     * 
     * @exception SQLException if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>;
     * this method is called on a closed result set
     * or if this method is called when the cursor is on the insert row
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void deleteRow() throws SQLException;

    /**
     * Refreshes the current row with its most recent value in
     * the database.  This method cannot be called when
     * the cursor is on the insert row.
     *
     * <P>The <code>refreshRow</code> method provides a way for an
     * application to
     * explicitly tell the JDBC driver to refetch a row(s) from the
     * database.  An application may want to call <code>refreshRow</code> when
     * caching or prefetching is being done by the JDBC driver to
     * fetch the latest value of a row from the database.  The JDBC driver
     * may actually refresh multiple rows at once if the fetch size is
     * greater than one.
     *
     * <P> All values are refetched subject to the transaction isolation
     * level and cursor sensitivity.  If <code>refreshRow</code> is called after
     * calling an updater method, but before calling
     * the method <code>updateRow</code>, then the
     * updates made to the row are lost.  Calling the method
     * <code>refreshRow</code> frequently will likely slow performance.
     *
     * <p>
     * 使用数据库中的最新值刷新当前行当光标位于插入行上时,无法调用此方法
     * 
     *  <code> refreshRow </code>方法为应用程序提供了一种明确告诉JDBC驱动程序从数据库中提取行的方法。
     * 应用程序可能想在调用<code> refreshRow </code>时调用缓存或预取由JDBC驱动程序来完成,以从数据库获取行的最新值。如果获取大小大于1,JDBC驱动程序可能实际上一次刷新多个行。
     * 
     * <P>根据事务隔离级别和游标敏感性重新获取所有值如果在调用updater方法后调用<code> refreshRow </code>时调用<code> updateRow </code>方法,对行的丢失
     * 调用方法<code> refreshRow </code>经常可能会降低性能。
     * 
     * 
     * @exception SQLException if a database access error
     * occurs; this method is called on a closed result set;
     * the result set type is <code>TYPE_FORWARD_ONLY</code> or if this
     * method is called when the cursor is on the insert row
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method or this method is not supported for the specified result
     * set type and result set concurrency.
     * @since 1.2
     */
    void refreshRow() throws SQLException;

    /**
     * Cancels the updates made to the current row in this
     * <code>ResultSet</code> object.
     * This method may be called after calling an
     * updater method(s) and before calling
     * the method <code>updateRow</code> to roll back
     * the updates made to a row.  If no updates have been made or
     * <code>updateRow</code> has already been called, this method has no
     * effect.
     *
     * <p>
     *  取消对此<code> ResultSet </code>对象中当前行所做的更新此方法可在调用updater方法之后调用方法<code> updateRow </code>以回滚更新对行进行如果没有进行
     * 更新或已经调用<code> updateRow </code>,此方法没有效果。
     * 
     * 
     * @exception SQLException if a database access error
     *            occurs; this method is called on a closed result set;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or if this method is called when the cursor is
     *            on the insert row
      * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void cancelRowUpdates() throws SQLException;

    /**
     * Moves the cursor to the insert row.  The current cursor position is
     * remembered while the cursor is positioned on the insert row.
     *
     * The insert row is a special row associated with an updatable
     * result set.  It is essentially a buffer where a new row may
     * be constructed by calling the updater methods prior to
     * inserting the row into the result set.
     *
     * Only the updater, getter,
     * and <code>insertRow</code> methods may be
     * called when the cursor is on the insert row.  All of the columns in
     * a result set must be given a value each time this method is
     * called before calling <code>insertRow</code>.
     * An updater method must be called before a
     * getter method can be called on a column value.
     *
     * <p>
     * 将光标移动到插入行当光标位于插入行上时,将记住当前光标位置
     * 
     *  插入行是与可更新结果集相关联的特殊行它实际上是一个缓冲区,其中可以通过在将行插入结果集之前调用updater方法来构造新行
     * 
     *  当游标位于插入行上时,只能调用updater,getter和<code> insertRow </code>方法。每次调用此方法时,必须给结果集中的所有列赋值。
     *  > insertRow </code>在对列值调用getter方法之前,必须调用updater方法。
     * 
     * 
     * @exception SQLException if a database access error occurs; this
     * method is called on a closed result set
     * or the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void moveToInsertRow() throws SQLException;

    /**
     * Moves the cursor to the remembered cursor position, usually the
     * current row.  This method has no effect if the cursor is not on
     * the insert row.
     *
     * <p>
     * 将光标移动到记住的光标位置,通常是当前行如果光标不在插入行上,此方法不起作用
     * 
     * 
     * @exception SQLException if a database access error occurs; this
     * method is called on a closed result set
     *  or the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    void moveToCurrentRow() throws SQLException;

    /**
     * Retrieves the <code>Statement</code> object that produced this
     * <code>ResultSet</code> object.
     * If the result set was generated some other way, such as by a
     * <code>DatabaseMetaData</code> method, this method  may return
     * <code>null</code>.
     *
     * <p>
     *  检索生成此<code> ResultSet </code>对象的<code> Statement </code>对象如果结果集是以某种其他方式生成的,例如通过<code> DatabaseMetaDa
     * ta </code> return <code> null </code>。
     * 
     * 
     * @return the <code>Statement</code> object that produced
     * this <code>ResultSet</code> object or <code>null</code>
     * if the result set was produced some other way
     * @exception SQLException if a database access error occurs
     * or this method is called on a closed result set
     * @since 1.2
     */
    Statement getStatement() throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as an <code>Object</code>
     * in the Java programming language.
     * If the value is an SQL <code>NULL</code>,
     * the driver returns a Java <code>null</code>.
     * This method uses the given <code>Map</code> object
     * for the custom mapping of the
     * SQL structured or distinct type that is being retrieved.
     *
     * <p>
     *  以Java编程语言中的<code> Object </code>检索此<code> ResultSet </code>对象的当前行中指定列的值如果值为SQL <code> NULL </code >,
     * 驱动程序返回一个Java <code> null </code>此方法使用给定的<code> Map </code>对象来检索正在检索的SQL结构化或不同类型的自定义映射。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param map a <code>java.util.Map</code> object that contains the mapping
     * from SQL type names to classes in the Java programming language
     * @return an <code>Object</code> in the Java programming language
     * representing the SQL value
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    Object getObject(int columnIndex, java.util.Map<String,Class<?>> map)
        throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as a <code>Ref</code> object
     * in the Java programming language.
     *
     * <p>
     * 将此<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> Ref </code>对象
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @return a <code>Ref</code> object representing an SQL <code>REF</code>
     *         value
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    Ref getRef(int columnIndex) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as a <code>Blob</code> object
     * in the Java programming language.
     *
     * <p>
     *  将此<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> Blob </code>对象
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @return a <code>Blob</code> object representing the SQL
     *         <code>BLOB</code> value in the specified column
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    Blob getBlob(int columnIndex) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as a <code>Clob</code> object
     * in the Java programming language.
     *
     * <p>
     *  将此<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> Clob </code>对象
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @return a <code>Clob</code> object representing the SQL
     *         <code>CLOB</code> value in the specified column
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    Clob getClob(int columnIndex) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as an <code>Array</code> object
     * in the Java programming language.
     *
     * <p>
     *  将此<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> Array </code>对象
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @return an <code>Array</code> object representing the SQL
     *         <code>ARRAY</code> value in the specified column
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs
     * or this method is called on a closed result set
      * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    Array getArray(int columnIndex) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as an <code>Object</code>
     * in the Java programming language.
     * If the value is an SQL <code>NULL</code>,
     * the driver returns a Java <code>null</code>.
     * This method uses the specified <code>Map</code> object for
     * custom mapping if appropriate.
     *
     * <p>
     * 以Java编程语言中的<code> Object </code>检索此<code> ResultSet </code>对象的当前行中指定列的值如果值为SQL <code> NULL </code >,驱
     * 动程序返回一个Java <code> null </code>此方法使用指定的<code> Map </code>对象进行自定义映射。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param map a <code>java.util.Map</code> object that contains the mapping
     * from SQL type names to classes in the Java programming language
     * @return an <code>Object</code> representing the SQL value in the
     *         specified column
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    Object getObject(String columnLabel, java.util.Map<String,Class<?>> map)
      throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as a <code>Ref</code> object
     * in the Java programming language.
     *
     * <p>
     *  将此<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> Ref </code>对象
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @return a <code>Ref</code> object representing the SQL <code>REF</code>
     *         value in the specified column
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs
     * or this method is called on a closed result set
      * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    Ref getRef(String columnLabel) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as a <code>Blob</code> object
     * in the Java programming language.
     *
     * <p>
     *  将此<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> Blob </code>对象
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @return a <code>Blob</code> object representing the SQL <code>BLOB</code>
     *         value in the specified column
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    Blob getBlob(String columnLabel) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as a <code>Clob</code> object
     * in the Java programming language.
     *
     * <p>
     * 将此<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> Clob </code>对象
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @return a <code>Clob</code> object representing the SQL <code>CLOB</code>
     * value in the specified column
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs
     * or this method is called on a closed result set
      * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    Clob getClob(String columnLabel) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as an <code>Array</code> object
     * in the Java programming language.
     *
     * <p>
     *  将此<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> Array </code>对象
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @return an <code>Array</code> object representing the SQL <code>ARRAY</code> value in
     *         the specified column
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.2
     */
    Array getArray(String columnLabel) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as a <code>java.sql.Date</code> object
     * in the Java programming language.
     * This method uses the given calendar to construct an appropriate millisecond
     * value for the date if the underlying database does not store
     * timezone information.
     *
     * <p>
     *  将这个<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> javasqlDate </code>对象此方法使用给定的日历构建适当的毫秒值对
     * 于基础数据库不存储时区信息的日期。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param cal the <code>java.util.Calendar</code> object
     * to use in constructing the date
     * @return the column value as a <code>java.sql.Date</code> object;
     * if the value is SQL <code>NULL</code>,
     * the value returned is <code>null</code> in the Java programming language
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs
     * or this method is called on a closed result set
     * @since 1.2
     */
    java.sql.Date getDate(int columnIndex, Calendar cal) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as a <code>java.sql.Date</code> object
     * in the Java programming language.
     * This method uses the given calendar to construct an appropriate millisecond
     * value for the date if the underlying database does not store
     * timezone information.
     *
     * <p>
     * 将这个<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> javasqlDate </code>对象此方法使用给定的日历构建适当的毫秒值对于
     * 基础数据库不存储时区信息的日期。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param cal the <code>java.util.Calendar</code> object
     * to use in constructing the date
     * @return the column value as a <code>java.sql.Date</code> object;
     * if the value is SQL <code>NULL</code>,
     * the value returned is <code>null</code> in the Java programming language
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs
     * or this method is called on a closed result set
     * @since 1.2
     */
    java.sql.Date getDate(String columnLabel, Calendar cal) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as a <code>java.sql.Time</code> object
     * in the Java programming language.
     * This method uses the given calendar to construct an appropriate millisecond
     * value for the time if the underlying database does not store
     * timezone information.
     *
     * <p>
     *  将此<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> javasqlTime </code>对象此方法使用给定的日历构建适当的毫秒值如果
     * 基础数据库不存储时区信息的时间。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param cal the <code>java.util.Calendar</code> object
     * to use in constructing the time
     * @return the column value as a <code>java.sql.Time</code> object;
     * if the value is SQL <code>NULL</code>,
     * the value returned is <code>null</code> in the Java programming language
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs
     * or this method is called on a closed result set
     * @since 1.2
     */
    java.sql.Time getTime(int columnIndex, Calendar cal) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as a <code>java.sql.Time</code> object
     * in the Java programming language.
     * This method uses the given calendar to construct an appropriate millisecond
     * value for the time if the underlying database does not store
     * timezone information.
     *
     * <p>
     * 将此<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> javasqlTime </code>对象此方法使用给定的日历构建适当的毫秒值如果基
     * 础数据库不存储时区信息的时间。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param cal the <code>java.util.Calendar</code> object
     * to use in constructing the time
     * @return the column value as a <code>java.sql.Time</code> object;
     * if the value is SQL <code>NULL</code>,
     * the value returned is <code>null</code> in the Java programming language
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs
     * or this method is called on a closed result set
     * @since 1.2
     */
    java.sql.Time getTime(String columnLabel, Calendar cal) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as a <code>java.sql.Timestamp</code> object
     * in the Java programming language.
     * This method uses the given calendar to construct an appropriate millisecond
     * value for the timestamp if the underlying database does not store
     * timezone information.
     *
     * <p>
     *  将这个<code> ResultSet </code>对象的当前行中的指定列的值作为Java编程语言中的<code> javasqlTimestamp </code>对象获取此方法使用给定的日历构建一
     * 个适当的毫秒值对于基础数据库不存储时区信息的时间戳。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param cal the <code>java.util.Calendar</code> object
     * to use in constructing the timestamp
     * @return the column value as a <code>java.sql.Timestamp</code> object;
     * if the value is SQL <code>NULL</code>,
     * the value returned is <code>null</code> in the Java programming language
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs
     * or this method is called on a closed result set
     * @since 1.2
     */
    java.sql.Timestamp getTimestamp(int columnIndex, Calendar cal)
      throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as a <code>java.sql.Timestamp</code> object
     * in the Java programming language.
     * This method uses the given calendar to construct an appropriate millisecond
     * value for the timestamp if the underlying database does not store
     * timezone information.
     *
     * <p>
     * 将这个<code> ResultSet </code>对象的当前行中的指定列的值作为Java编程语言中的<code> javasqlTimestamp </code>对象获取此方法使用给定的日历构建一个
     * 适当的毫秒值对于基础数据库不存储时区信息的时间戳。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param cal the <code>java.util.Calendar</code> object
     * to use in constructing the date
     * @return the column value as a <code>java.sql.Timestamp</code> object;
     * if the value is SQL <code>NULL</code>,
     * the value returned is <code>null</code> in the Java programming language
     * @exception SQLException if the columnLabel is not valid or
     * if a database access error occurs
     * or this method is called on a closed result set
     * @since 1.2
     */
    java.sql.Timestamp getTimestamp(String columnLabel, Calendar cal)
      throws SQLException;

    //-------------------------- JDBC 3.0 ----------------------------------------

    /**
     * The constant indicating that open <code>ResultSet</code> objects with this
     * holdability will remain open when the current transaction is committed.
     *
     * <p>
     *  当提交当前事务时,指示具有此可保持性的open <code> ResultSet </code>对象的常量将保持打开
     * 
     * 
     * @since 1.4
     */
    int HOLD_CURSORS_OVER_COMMIT = 1;

    /**
     * The constant indicating that open <code>ResultSet</code> objects with this
     * holdability will be closed when the current transaction is committed.
     *
     * <p>
     *  当提交当前事务时,指示具有此保持性的open <code> ResultSet </code>对象的常量将被关闭
     * 
     * 
     * @since 1.4
     */
    int CLOSE_CURSORS_AT_COMMIT = 2;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as a <code>java.net.URL</code>
     * object in the Java programming language.
     *
     * <p>
     * 将此<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> javanetURL </code>对象
     * 
     * 
     * @param columnIndex the index of the column 1 is the first, 2 is the second,...
     * @return the column value as a <code>java.net.URL</code> object;
     * if the value is SQL <code>NULL</code>,
     * the value returned is <code>null</code> in the Java programming language
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs; this method
     * is called on a closed result set or if a URL is malformed
      * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.4
     */
    java.net.URL getURL(int columnIndex) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as a <code>java.net.URL</code>
     * object in the Java programming language.
     *
     * <p>
     *  将此<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> javanetURL </code>对象
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @return the column value as a <code>java.net.URL</code> object;
     * if the value is SQL <code>NULL</code>,
     * the value returned is <code>null</code> in the Java programming language
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs; this method
     * is called on a closed result set or if a URL is malformed
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.4
     */
    java.net.URL getURL(String columnLabel) throws SQLException;

    /**
     * Updates the designated column with a <code>java.sql.Ref</code> value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用<code> javasqlRef </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>
     * 或<code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param x the new column value
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.4
     */
    void updateRef(int columnIndex, java.sql.Ref x) throws SQLException;

    /**
     * Updates the designated column with a <code>java.sql.Ref</code> value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     * 使用<code> javasqlRef </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>
     * 或<code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param x the new column value
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.4
     */
    void updateRef(String columnLabel, java.sql.Ref x) throws SQLException;

    /**
     * Updates the designated column with a <code>java.sql.Blob</code> value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用<code> javasqlBlob </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>
     * 或<code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param x the new column value
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.4
     */
    void updateBlob(int columnIndex, java.sql.Blob x) throws SQLException;

    /**
     * Updates the designated column with a <code>java.sql.Blob</code> value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     * 使用<code> javasqlBlob </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>
     * 或<code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param x the new column value
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.4
     */
    void updateBlob(String columnLabel, java.sql.Blob x) throws SQLException;

    /**
     * Updates the designated column with a <code>java.sql.Clob</code> value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用<code> javasqlClob </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>
     * 或<code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param x the new column value
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.4
     */
    void updateClob(int columnIndex, java.sql.Clob x) throws SQLException;

    /**
     * Updates the designated column with a <code>java.sql.Clob</code> value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     * 使用<code> javasqlClob </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>
     * 或<code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param x the new column value
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.4
     */
    void updateClob(String columnLabel, java.sql.Clob x) throws SQLException;

    /**
     * Updates the designated column with a <code>java.sql.Array</code> value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用<code> javasqlArray </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow 
     * </code>或<code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param x the new column value
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.4
     */
    void updateArray(int columnIndex, java.sql.Array x) throws SQLException;

    /**
     * Updates the designated column with a <code>java.sql.Array</code> value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     * 使用<code> javasqlArray </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>
     * 或<code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param x the new column value
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.4
     */
    void updateArray(String columnLabel, java.sql.Array x) throws SQLException;

    //------------------------- JDBC 4.0 -----------------------------------

    /**
     * Retrieves the value of the designated column in the current row of this
     * <code>ResultSet</code> object as a <code>java.sql.RowId</code> object in the Java
     * programming language.
     *
     * <p>
     *  将这个<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> javasqlRowId </code>对象
     * 
     * 
     * @param columnIndex the first column is 1, the second 2, ...
     * @return the column value; if the value is a SQL <code>NULL</code> the
     *     value returned is <code>null</code>
     * @throws SQLException if the columnIndex is not valid;
     * if a database access error occurs
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    RowId getRowId(int columnIndex) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row of this
     * <code>ResultSet</code> object as a <code>java.sql.RowId</code> object in the Java
     * programming language.
     *
     * <p>
     *  将这个<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> javasqlRowId </code>对象
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @return the column value ; if the value is a SQL <code>NULL</code> the
     *     value returned is <code>null</code>
     * @throws SQLException if the columnLabel is not valid;
     * if a database access error occurs
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    RowId getRowId(String columnLabel) throws SQLException;

    /**
     * Updates the designated column with a <code>RowId</code> value. The updater
     * methods are used to update column values in the current row or the insert
     * row. The updater methods do not update the underlying database; instead
     * the <code>updateRow</code> or <code>insertRow</code> methods are called
     * to update the database.
     *
     * <p>
     * 使用<code> RowId </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不更新基础数据库;而是调用<code> updateRow </code>或<code>
     *  insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnIndex the first column is 1, the second 2, ...
     * @param x the column value
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateRowId(int columnIndex, RowId x) throws SQLException;

    /**
     * Updates the designated column with a <code>RowId</code> value. The updater
     * methods are used to update column values in the current row or the insert
     * row. The updater methods do not update the underlying database; instead
     * the <code>updateRow</code> or <code>insertRow</code> methods are called
     * to update the database.
     *
     * <p>
     *  使用<code> RowId </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不更新基础数据库;而是调用<code> updateRow </code>或
     * <code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param x the column value
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateRowId(String columnLabel, RowId x) throws SQLException;

    /**
     * Retrieves the holdability of this <code>ResultSet</code> object
     * <p>
     *  检索此<code> ResultSet </code>对象的可保留性
     * 
     * 
     * @return  either <code>ResultSet.HOLD_CURSORS_OVER_COMMIT</code> or <code>ResultSet.CLOSE_CURSORS_AT_COMMIT</code>
     * @throws SQLException if a database access error occurs
     * or this method is called on a closed result set
     * @since 1.6
     */
    int getHoldability() throws SQLException;

    /**
     * Retrieves whether this <code>ResultSet</code> object has been closed. A <code>ResultSet</code> is closed if the
     * method close has been called on it, or if it is automatically closed.
     *
     * <p>
     * 检索此<code> ResultSet </code>对象是否已关闭如果方法close已被调用,或如果它被自动关闭,则<code> ResultSet </code>
     * 
     * 
     * @return true if this <code>ResultSet</code> object is closed; false if it is still open
     * @throws SQLException if a database access error occurs
     * @since 1.6
     */
    boolean isClosed() throws SQLException;

    /**
     * Updates the designated column with a <code>String</code> value.
     * It is intended for use when updating <code>NCHAR</code>,<code>NVARCHAR</code>
     * and <code>LONGNVARCHAR</code> columns.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  更新指定的列与<code> String </code>值它适用于更新<code> NCHAR </code>,<code> NVARCHAR </code>和<code> LONGNVARCHAR 
     * </code> updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>
     * 方法来更新数据库。
     * 
     * 
     * @param columnIndex the first column is 1, the second 2, ...
     * @param nString the value for the column to be updated
     * @throws SQLException if the columnIndex is not valid;
     * if the driver does not support national
     *         character sets;  if the driver can detect that a data conversion
     *  error could occur; this method is called on a closed result set;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or if a database access error occurs
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateNString(int columnIndex, String nString) throws SQLException;

    /**
     * Updates the designated column with a <code>String</code> value.
     * It is intended for use when updating <code>NCHAR</code>,<code>NVARCHAR</code>
     * and <code>LONGNVARCHAR</code> columns.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     * 更新指定的列与<code> String </code>值它适用于更新<code> NCHAR </code>,<code> NVARCHAR </code>和<code> LONGNVARCHAR </code>
     *  updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新
     * 数据库。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param nString the value for the column to be updated
     * @throws SQLException if the columnLabel is not valid;
     * if the driver does not support national
     *         character sets;  if the driver can detect that a data conversion
     *  error could occur; this method is called on a closed result set;
     * the result set concurrency is <CODE>CONCUR_READ_ONLY</code>
     *  or if a database access error occurs
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateNString(String columnLabel, String nString) throws SQLException;

    /**
     * Updates the designated column with a <code>java.sql.NClob</code> value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用<code> javasqlNClob </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow 
     * </code>或<code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnIndex the first column is 1, the second 2, ...
     * @param nClob the value for the column to be updated
     * @throws SQLException if the columnIndex is not valid;
     * if the driver does not support national
     *         character sets;  if the driver can detect that a data conversion
     *  error could occur; this method is called on a closed result set;
     * if a database access error occurs or
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateNClob(int columnIndex, NClob nClob) throws SQLException;

    /**
     * Updates the designated column with a <code>java.sql.NClob</code> value.
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     * 使用<code> javasqlNClob </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow </code>
     * 或<code> insertRow </code>方法来更新数据库。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param nClob the value for the column to be updated
     * @throws SQLException if the columnLabel is not valid;
     * if the driver does not support national
     *         character sets;  if the driver can detect that a data conversion
     *  error could occur; this method is called on a closed result set;
     *  if a database access error occurs or
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateNClob(String columnLabel, NClob nClob) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as a <code>NClob</code> object
     * in the Java programming language.
     *
     * <p>
     *  将此<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> NClob </code>对象
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @return a <code>NClob</code> object representing the SQL
     *         <code>NCLOB</code> value in the specified column
     * @exception SQLException if the columnIndex is not valid;
     * if the driver does not support national
     *         character sets;  if the driver can detect that a data conversion
     *  error could occur; this method is called on a closed result set
     * or if a database access error occurs
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    NClob getNClob(int columnIndex) throws SQLException;

  /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as a <code>NClob</code> object
     * in the Java programming language.
     *
     * <p>
     *  将此<code> ResultSet </code>对象的当前行中的指定列的值检索为Java编程语言中的<code> NClob </code>对象
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @return a <code>NClob</code> object representing the SQL <code>NCLOB</code>
     * value in the specified column
     * @exception SQLException if the columnLabel is not valid;
   * if the driver does not support national
     *         character sets;  if the driver can detect that a data conversion
     *  error could occur; this method is called on a closed result set
     * or if a database access error occurs
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    NClob getNClob(String columnLabel) throws SQLException;

    /**
     * Retrieves the value of the designated column in  the current row of
     *  this <code>ResultSet</code> as a
     * <code>java.sql.SQLXML</code> object in the Java programming language.
     * <p>
     * 将此<code> ResultSet </code>当前行中指定列的值作为Java编程语言中的<code> javasqlSQLXML </code>对象
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @return a <code>SQLXML</code> object that maps an <code>SQL XML</code> value
     * @throws SQLException if the columnIndex is not valid;
     * if a database access error occurs
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    SQLXML getSQLXML(int columnIndex) throws SQLException;

    /**
     * Retrieves the value of the designated column in  the current row of
     *  this <code>ResultSet</code> as a
     * <code>java.sql.SQLXML</code> object in the Java programming language.
     * <p>
     *  将此<code> ResultSet </code>当前行中指定列的值作为Java编程语言中的<code> javasqlSQLXML </code>对象
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @return a <code>SQLXML</code> object that maps an <code>SQL XML</code> value
     * @throws SQLException if the columnLabel is not valid;
     * if a database access error occurs
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    SQLXML getSQLXML(String columnLabel) throws SQLException;
    /**
     * Updates the designated column with a <code>java.sql.SQLXML</code> value.
     * The updater
     * methods are used to update column values in the current row or the insert
     * row. The updater methods do not update the underlying database; instead
     * the <code>updateRow</code> or <code>insertRow</code> methods are called
     * to update the database.
     * <p>
     *
     * <p>
     *  使用<code> javasqlSQLXML </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow
     *  </code>或<code> insertRow </code>方法来更新数据库。
     * <p>
     * 
     * 
     * @param columnIndex the first column is 1, the second 2, ...
     * @param xmlObject the value for the column to be updated
     * @throws SQLException if the columnIndex is not valid;
     * if a database access error occurs; this method
     *  is called on a closed result set;
     * the <code>java.xml.transform.Result</code>,
     *  <code>Writer</code> or <code>OutputStream</code> has not been closed
     * for the <code>SQLXML</code> object;
     *  if there is an error processing the XML value or
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>.  The <code>getCause</code> method
     *  of the exception may provide a more detailed exception, for example, if the
     *  stream does not contain valid XML.
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateSQLXML(int columnIndex, SQLXML xmlObject) throws SQLException;
    /**
     * Updates the designated column with a <code>java.sql.SQLXML</code> value.
     * The updater
     * methods are used to update column values in the current row or the insert
     * row. The updater methods do not update the underlying database; instead
     * the <code>updateRow</code> or <code>insertRow</code> methods are called
     * to update the database.
     * <p>
     *
     * <p>
     * 使用<code> javasqlSQLXML </code>值更新指定的列updater方法用于更新当前行或插入行中的列值updater方法不会更新基础数据库;而是调用<code> updateRow 
     * </code>或<code> insertRow </code>方法来更新数据库。
     * <p>
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param xmlObject the column value
     * @throws SQLException if the columnLabel is not valid;
     * if a database access error occurs; this method
     *  is called on a closed result set;
     * the <code>java.xml.transform.Result</code>,
     *  <code>Writer</code> or <code>OutputStream</code> has not been closed
     * for the <code>SQLXML</code> object;
     *  if there is an error processing the XML value or
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>.  The <code>getCause</code> method
     *  of the exception may provide a more detailed exception, for example, if the
     *  stream does not contain valid XML.
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateSQLXML(String columnLabel, SQLXML xmlObject) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>String</code> in the Java programming language.
     * It is intended for use when
     * accessing  <code>NCHAR</code>,<code>NVARCHAR</code>
     * and <code>LONGNVARCHAR</code> columns.
     *
     * <p>
     *  以Java编程语言中的<code> String </code>检索此<code> ResultSet </code>对象的当前行中指定列的值。
     * 它用于访问<code> NCHAR <代码>,<code> NVARCHAR </code>和<code> LONGNVARCHAR </code>列。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>null</code>
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    String getNString(int columnIndex) throws SQLException;


    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as
     * a <code>String</code> in the Java programming language.
     * It is intended for use when
     * accessing  <code>NCHAR</code>,<code>NVARCHAR</code>
     * and <code>LONGNVARCHAR</code> columns.
     *
     * <p>
     * 以Java编程语言中的<code> String </code>检索此<code> ResultSet </code>对象的当前行中指定列的值。
     * 它用于访问<code> NCHAR <代码>,<code> NVARCHAR </code>和<code> LONGNVARCHAR </code>列。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @return the column value; if the value is SQL <code>NULL</code>, the
     * value returned is <code>null</code>
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    String getNString(String columnLabel) throws SQLException;


    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as a
     * <code>java.io.Reader</code> object.
     * It is intended for use when
     * accessing  <code>NCHAR</code>,<code>NVARCHAR</code>
     * and <code>LONGNVARCHAR</code> columns.
     *
     * <p>
     *  以<code> javaioReader </code>对象的形式获取此<code> ResultSet </code>对象的当前行中指定列的值。
     * 它用于访问<code> NCHAR </code>代码> NVARCHAR </code>和<code> LONGNVARCHAR </code>列。
     * 
     * 
     * @return a <code>java.io.Reader</code> object that contains the column
     * value; if the value is SQL <code>NULL</code>, the value returned is
     * <code>null</code> in the Java programming language.
     * @param columnIndex the first column is 1, the second is 2, ...
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    java.io.Reader getNCharacterStream(int columnIndex) throws SQLException;

    /**
     * Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object as a
     * <code>java.io.Reader</code> object.
     * It is intended for use when
     * accessing  <code>NCHAR</code>,<code>NVARCHAR</code>
     * and <code>LONGNVARCHAR</code> columns.
     *
     * <p>
     * 以<code> javaioReader </code>对象的形式获取此<code> ResultSet </code>对象的当前行中指定列的值。
     * 它用于访问<code> NCHAR </code>代码> NVARCHAR </code>和<code> LONGNVARCHAR </code>列。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @return a <code>java.io.Reader</code> object that contains the column
     * value; if the value is SQL <code>NULL</code>, the value returned is
     * <code>null</code> in the Java programming language
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    java.io.Reader getNCharacterStream(String columnLabel) throws SQLException;

    /**
     * Updates the designated column with a character stream value, which will have
     * the specified number of bytes.   The
     * driver does the necessary conversion from Java character format to
     * the national character set in the database.
     * It is intended for use when
     * updating  <code>NCHAR</code>,<code>NVARCHAR</code>
     * and <code>LONGNVARCHAR</code> columns.
     * <p>
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用字符流值更新指定的列,该值将具有指定的字节数驱动程序执行从Java字符格式到数据库中的国家字符集的必要转换它适用于更新<code> NCHAR </code >,<code> NVARCHAR </code>
     * 和<code> LONGNVARCHAR </code>列。
     * <p>
     * updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新数
     * 据库。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param x the new column value
     * @param length the length of the stream
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code> or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateNCharacterStream(int columnIndex,
                             java.io.Reader x,
                             long length) throws SQLException;

    /**
     * Updates the designated column with a character stream value, which will have
     * the specified number of bytes.  The
     * driver does the necessary conversion from Java character format to
     * the national character set in the database.
     * It is intended for use when
     * updating  <code>NCHAR</code>,<code>NVARCHAR</code>
     * and <code>LONGNVARCHAR</code> columns.
     * <p>
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用字符流值更新指定的列,该值将具有指定的字节数驱动程序执行从Java字符格式到数据库中的国家字符集的必要转换适用于更新<code> NCHAR </code >,<code> NVARCHAR </code>
     * 和<code> LONGNVARCHAR </code>列。
     * <p>
     * updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新数
     * 据库。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param reader the <code>java.io.Reader</code> object containing
     *        the new column value
     * @param length the length of the stream
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code> or this method is called on a closed result set
      * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateNCharacterStream(String columnLabel,
                             java.io.Reader reader,
                             long length) throws SQLException;
    /**
     * Updates the designated column with an ascii stream value, which will have
     * the specified number of bytes.
     * <p>
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用ascii流值更新指定的列,该值将具有指定的字节数
     * <p>
     *  updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新
     * 数据库。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param x the new column value
     * @param length the length of the stream
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateAsciiStream(int columnIndex,
                           java.io.InputStream x,
                           long length) throws SQLException;

    /**
     * Updates the designated column with a binary stream value, which will have
     * the specified number of bytes.
     * <p>
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用二进制流值更新指定的列,该值将具有指定的字节数
     * <p>
     * updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新数
     * 据库。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param x the new column value
     * @param length the length of the stream
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateBinaryStream(int columnIndex,
                            java.io.InputStream x,
                            long length) throws SQLException;

    /**
     * Updates the designated column with a character stream value, which will have
     * the specified number of bytes.
     * <p>
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用字符流值更新指定的列,该值将具有指定的字节数
     * <p>
     *  updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新
     * 数据库。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param x the new column value
     * @param length the length of the stream
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateCharacterStream(int columnIndex,
                             java.io.Reader x,
                             long length) throws SQLException;
    /**
     * Updates the designated column with an ascii stream value, which will have
     * the specified number of bytes.
     * <p>
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用ascii流值更新指定的列,该值将具有指定的字节数
     * <p>
     * updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新数
     * 据库。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param x the new column value
     * @param length the length of the stream
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateAsciiStream(String columnLabel,
                           java.io.InputStream x,
                           long length) throws SQLException;

    /**
     * Updates the designated column with a binary stream value, which will have
     * the specified number of bytes.
     * <p>
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用二进制流值更新指定的列,该值将具有指定的字节数
     * <p>
     *  updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新
     * 数据库。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param x the new column value
     * @param length the length of the stream
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateBinaryStream(String columnLabel,
                            java.io.InputStream x,
                            long length) throws SQLException;

    /**
     * Updates the designated column with a character stream value, which will have
     * the specified number of bytes.
     * <p>
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用字符流值更新指定的列,该值将具有指定的字节数
     * <p>
     * updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新数
     * 据库。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param reader the <code>java.io.Reader</code> object containing
     *        the new column value
     * @param length the length of the stream
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateCharacterStream(String columnLabel,
                             java.io.Reader reader,
                             long length) throws SQLException;
    /**
     * Updates the designated column using the given input stream, which
     * will have the specified number of bytes.
     *
     * <p>
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用给定的输入流更新指定的列,该输入流将具有指定的字节数
     * 
     * <p>
     *  updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新
     * 数据库。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param inputStream An object that contains the data to set the parameter
     * value to.
     * @param length the number of bytes in the parameter data.
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateBlob(int columnIndex, InputStream inputStream, long length) throws SQLException;

    /**
     * Updates the designated column using the given input stream, which
     * will have the specified number of bytes.
     *
     * <p>
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用给定的输入流更新指定的列,该输入流将具有指定的字节数
     * 
     * <p>
     * updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新数
     * 据库。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param inputStream An object that contains the data to set the parameter
     * value to.
     * @param length the number of bytes in the parameter data.
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateBlob(String columnLabel, InputStream inputStream, long length) throws SQLException;

    /**
     * Updates the designated column using the given <code>Reader</code>
     * object, which is the given number of characters long.
     * When a very large UNICODE value is input to a <code>LONGVARCHAR</code>
     * parameter, it may be more practical to send it via a
     * <code>java.io.Reader</code> object. The JDBC driver will
     * do any necessary conversion from UNICODE to the database char format.
     *
     * <p>
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用给定的<code> Reader </code>对象更新指定的列,这是给定的字符数长当将非常大的UNICODE值输入到<code> LONGVARCHAR </code>参数时,通过<code> 
     * javaioReader </code>对象发送它JDBC驱动程序将执行从UNICODE到数据库字符格式的任何必要的转换。
     * 
     * <p>
     * updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新数
     * 据库。
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param reader An object that contains the data to set the parameter value to.
     * @param length the number of characters in the parameter data.
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateClob(int columnIndex,  Reader reader, long length) throws SQLException;

    /**
     * Updates the designated column using the given <code>Reader</code>
     * object, which is the given number of characters long.
     * When a very large UNICODE value is input to a <code>LONGVARCHAR</code>
     * parameter, it may be more practical to send it via a
     * <code>java.io.Reader</code> object.  The JDBC driver will
     * do any necessary conversion from UNICODE to the database char format.
     *
     * <p>
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用给定的<code> Reader </code>对象更新指定的列,这是给定的字符数长当将一个非常大的UNICODE值输入到<code> LONGVARCHAR </code>参数时,通过<code>
     *  javaioReader </code>对象发送它JDBC驱动程序将执行从UNICODE到数据库字符格式的任何必要的转换。
     * 
     * <p>
     * updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新数
     * 据库。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param reader An object that contains the data to set the parameter value to.
     * @param length the number of characters in the parameter data.
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateClob(String columnLabel,  Reader reader, long length) throws SQLException;
   /**
     * Updates the designated column using the given <code>Reader</code>
     * object, which is the given number of characters long.
     * When a very large UNICODE value is input to a <code>LONGVARCHAR</code>
     * parameter, it may be more practical to send it via a
     * <code>java.io.Reader</code> object. The JDBC driver will
     * do any necessary conversion from UNICODE to the database char format.
     *
     * <p>
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用给定的<code> Reader </code>对象更新指定的列,这是给定的字符数长当将非常大的UNICODE值输入到<code> LONGVARCHAR </code>参数时,通过<code> 
     * javaioReader </code>对象发送它JDBC驱动程序将执行从UNICODE到数据库字符格式的任何必要的转换。
     * 
     * <p>
     * updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新数
     * 据库。
     * 
     * 
     * @param columnIndex the first column is 1, the second 2, ...
     * @param reader An object that contains the data to set the parameter value to.
     * @param length the number of characters in the parameter data.
     * @throws SQLException if the columnIndex is not valid;
    * if the driver does not support national
     *         character sets;  if the driver can detect that a data conversion
     *  error could occur; this method is called on a closed result set,
     * if a database access error occurs or
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateNClob(int columnIndex,  Reader reader, long length) throws SQLException;

    /**
     * Updates the designated column using the given <code>Reader</code>
     * object, which is the given number of characters long.
     * When a very large UNICODE value is input to a <code>LONGVARCHAR</code>
     * parameter, it may be more practical to send it via a
     * <code>java.io.Reader</code> object. The JDBC driver will
     * do any necessary conversion from UNICODE to the database char format.
     *
     * <p>
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <p>
     *  使用给定的<code> Reader </code>对象更新指定的列,这是给定的字符数长当将非常大的UNICODE值输入到<code> LONGVARCHAR </code>参数时,通过<code> 
     * javaioReader </code>对象发送它JDBC驱动程序将执行从UNICODE到数据库字符格式的任何必要的转换。
     * 
     * <p>
     * updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新数
     * 据库。
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param reader An object that contains the data to set the parameter value to.
     * @param length the number of characters in the parameter data.
     * @throws SQLException if the columnLabel is not valid;
     * if the driver does not support national
     *         character sets;  if the driver can detect that a data conversion
     *  error could occur; this method is called on a closed result set;
     *  if a database access error occurs or
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateNClob(String columnLabel,  Reader reader, long length) throws SQLException;

    //---

    /**
     * Updates the designated column with a character stream value.
     * The data will be read from the stream
     * as needed until end-of-stream is reached.  The
     * driver does the necessary conversion from Java character format to
     * the national character set in the database.
     * It is intended for use when
     * updating  <code>NCHAR</code>,<code>NVARCHAR</code>
     * and <code>LONGNVARCHAR</code> columns.
     * <p>
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <P><B>Note:</B> Consult your JDBC driver documentation to determine if
     * it might be more efficient to use a version of
     * <code>updateNCharacterStream</code> which takes a length parameter.
     *
     * <p>
     *  使用字符流值更新指定的列将根据需要从流中读取数据,直到达到流末尾驱动程序执行必要的从Java字符格式到数据库中的国家字符集的转换它是供使用当更新<code> NCHAR </code>,<code> 
     * NVARCHAR </code>和<code> LONGNVARCHAR </code>列。
     * <p>
     * updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新数
     * 据库。
     * 
     *  <P> <B>注意：</B>请参阅您的JDBC驱动程序文档,以确定是否使用一个版本的<code> updateNCharacterStream </code>
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param x the new column value
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code> or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateNCharacterStream(int columnIndex,
                             java.io.Reader x) throws SQLException;

    /**
     * Updates the designated column with a character stream value.
     * The data will be read from the stream
     * as needed until end-of-stream is reached.  The
     * driver does the necessary conversion from Java character format to
     * the national character set in the database.
     * It is intended for use when
     * updating  <code>NCHAR</code>,<code>NVARCHAR</code>
     * and <code>LONGNVARCHAR</code> columns.
     * <p>
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <P><B>Note:</B> Consult your JDBC driver documentation to determine if
     * it might be more efficient to use a version of
     * <code>updateNCharacterStream</code> which takes a length parameter.
     *
     * <p>
     * 使用字符流值更新指定的列将根据需要从流中读取数据,直到达到流末尾驱动程序执行必要的从Java字符格式到数据库中的国家字符集的转换它是供使用当更新<code> NCHAR </code>,<code> N
     * VARCHAR </code>和<code> LONGNVARCHAR </code>列。
     * <p>
     *  updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新
     * 数据库。
     * 
     * <P> <B>注意：</B>请参阅您的JDBC驱动程序文档,以确定是否使用一个版本的<code> updateNCharacterStream </code>
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param reader the <code>java.io.Reader</code> object containing
     *        the new column value
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code> or this method is called on a closed result set
      * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateNCharacterStream(String columnLabel,
                             java.io.Reader reader) throws SQLException;
    /**
     * Updates the designated column with an ascii stream value.
     * The data will be read from the stream
     * as needed until end-of-stream is reached.
     * <p>
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <P><B>Note:</B> Consult your JDBC driver documentation to determine if
     * it might be more efficient to use a version of
     * <code>updateAsciiStream</code> which takes a length parameter.
     *
     * <p>
     *  使用ascii流值更新指定的列将根据需要从流中读取数据,直到达到流终止
     * <p>
     *  updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新
     * 数据库。
     * 
     *  <P> <B>注意：</B>请查看您的JDBC驱动程序文档,以确定是否可以使用一个版本的<code> updateAsciiStream </code>
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param x the new column value
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateAsciiStream(int columnIndex,
                           java.io.InputStream x) throws SQLException;

    /**
     * Updates the designated column with a binary stream value.
     * The data will be read from the stream
     * as needed until end-of-stream is reached.
     * <p>
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <P><B>Note:</B> Consult your JDBC driver documentation to determine if
     * it might be more efficient to use a version of
     * <code>updateBinaryStream</code> which takes a length parameter.
     *
     * <p>
     * 使用二进制流值更新指定的列将根据需要从流中读取数据,直到到达流末尾
     * <p>
     *  updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新
     * 数据库。
     * 
     *  <P> <B>注意：</B>请查看您的JDBC驱动程序文档,以确定是否使用一个版本的<code> updateBinaryStream </code>
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param x the new column value
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateBinaryStream(int columnIndex,
                            java.io.InputStream x) throws SQLException;

    /**
     * Updates the designated column with a character stream value.
     * The data will be read from the stream
     * as needed until end-of-stream is reached.
     * <p>
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <P><B>Note:</B> Consult your JDBC driver documentation to determine if
     * it might be more efficient to use a version of
     * <code>updateCharacterStream</code> which takes a length parameter.
     *
     * <p>
     *  使用字符流值更新指定的列将根据需要从流中读取数据,直到到达流末尾
     * <p>
     * updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新数
     * 据库。
     * 
     *  <P> <B>注意：</B>请查看您的JDBC驱动程序文档,以确定是否可以使用一个版本的<code> updateCharacterStream </code>
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param x the new column value
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateCharacterStream(int columnIndex,
                             java.io.Reader x) throws SQLException;
    /**
     * Updates the designated column with an ascii stream value.
     * The data will be read from the stream
     * as needed until end-of-stream is reached.
     * <p>
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <P><B>Note:</B> Consult your JDBC driver documentation to determine if
     * it might be more efficient to use a version of
     * <code>updateAsciiStream</code> which takes a length parameter.
     *
     * <p>
     *  使用ascii流值更新指定的列将根据需要从流中读取数据,直到达到流终止
     * <p>
     * updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新数
     * 据库。
     * 
     *  <P> <B>注意：</B>请查看您的JDBC驱动程序文档,以确定是否可以使用一个版本的<code> updateAsciiStream </code>
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param x the new column value
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateAsciiStream(String columnLabel,
                           java.io.InputStream x) throws SQLException;

    /**
     * Updates the designated column with a binary stream value.
     * The data will be read from the stream
     * as needed until end-of-stream is reached.
     * <p>
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <P><B>Note:</B> Consult your JDBC driver documentation to determine if
     * it might be more efficient to use a version of
     * <code>updateBinaryStream</code> which takes a length parameter.
     *
     * <p>
     *  使用二进制流值更新指定的列将根据需要从流中读取数据,直到到达流末尾
     * <p>
     * updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新数
     * 据库。
     * 
     *  <P> <B>注意：</B>请查看您的JDBC驱动程序文档,以确定是否使用一个版本的<code> updateBinaryStream </code>
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param x the new column value
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateBinaryStream(String columnLabel,
                            java.io.InputStream x) throws SQLException;

    /**
     * Updates the designated column with a character stream value.
     * The data will be read from the stream
     * as needed until end-of-stream is reached.
     * <p>
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <P><B>Note:</B> Consult your JDBC driver documentation to determine if
     * it might be more efficient to use a version of
     * <code>updateCharacterStream</code> which takes a length parameter.
     *
     * <p>
     *  使用字符流值更新指定的列将根据需要从流中读取数据,直到到达流末尾
     * <p>
     * updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新数
     * 据库。
     * 
     *  <P> <B>注意：</B>请查看您的JDBC驱动程序文档,以确定是否可以使用一个版本的<code> updateCharacterStream </code>
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param reader the <code>java.io.Reader</code> object containing
     *        the new column value
     * @exception SQLException if the columnLabel is not valid; if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateCharacterStream(String columnLabel,
                             java.io.Reader reader) throws SQLException;
    /**
     * Updates the designated column using the given input stream. The data will be read from the stream
     * as needed until end-of-stream is reached.
     * <p>
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <P><B>Note:</B> Consult your JDBC driver documentation to determine if
     * it might be more efficient to use a version of
     * <code>updateBlob</code> which takes a length parameter.
     *
     * <p>
     *  使用给定的输入流更新指定的列将根据需要从流中读取数据,直到达到流末尾
     * <p>
     * updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新数
     * 据库。
     * 
     *  <P> <B>注意：</B>请查看您的JDBC驱动程序文档,以确定是否可以使用一个版本的<code> updateBlob </code>
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param inputStream An object that contains the data to set the parameter
     * value to.
     * @exception SQLException if the columnIndex is not valid; if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateBlob(int columnIndex, InputStream inputStream) throws SQLException;

    /**
     * Updates the designated column using the given input stream. The data will be read from the stream
     * as needed until end-of-stream is reached.
     * <p>
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     *   <P><B>Note:</B> Consult your JDBC driver documentation to determine if
     * it might be more efficient to use a version of
     * <code>updateBlob</code> which takes a length parameter.
     *
     * <p>
     *  使用给定的输入流更新指定的列将根据需要从流中读取数据,直到达到流末尾
     * <p>
     * updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新数
     * 据库。
     * 
     *  <P> <B>注意：</B>请查看您的JDBC驱动程序文档,以确定是否可以使用一个版本的<code> updateBlob </code>
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param inputStream An object that contains the data to set the parameter
     * value to.
     * @exception SQLException if the columnLabel is not valid; if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateBlob(String columnLabel, InputStream inputStream) throws SQLException;

    /**
     * Updates the designated column using the given <code>Reader</code>
     * object.
     *  The data will be read from the stream
     * as needed until end-of-stream is reached.  The JDBC driver will
     * do any necessary conversion from UNICODE to the database char format.
     *
     * <p>
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     *   <P><B>Note:</B> Consult your JDBC driver documentation to determine if
     * it might be more efficient to use a version of
     * <code>updateClob</code> which takes a length parameter.
     *
     * <p>
     *  使用给定的<code> Reader </code>对象更新指定的列。将根据需要从流中读取数据,直到达到流末尾JDBC驱动程序将执行从UNICODE到数据库字符格式的任何必要的转换
     * 
     * <p>
     * updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新数
     * 据库。
     * 
     *  <P> <B>注意：</B>请查看您的JDBC驱动程序文档,以确定是否使用一个版本的<code> updateClob </code>
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param reader An object that contains the data to set the parameter value to.
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateClob(int columnIndex,  Reader reader) throws SQLException;

    /**
     * Updates the designated column using the given <code>Reader</code>
     * object.
     *  The data will be read from the stream
     * as needed until end-of-stream is reached.  The JDBC driver will
     * do any necessary conversion from UNICODE to the database char format.
     *
     * <p>
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <P><B>Note:</B> Consult your JDBC driver documentation to determine if
     * it might be more efficient to use a version of
     * <code>updateClob</code> which takes a length parameter.
     *
     * <p>
     *  使用给定的<code> Reader </code>对象更新指定的列。将根据需要从流中读取数据,直到达到流末尾JDBC驱动程序将执行从UNICODE到数据库字符格式的任何必要的转换
     * 
     * <p>
     * updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新数
     * 据库。
     * 
     *  <P> <B>注意：</B>请查看您的JDBC驱动程序文档,以确定是否使用一个版本的<code> updateClob </code>
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param reader An object that contains the data to set the parameter value to.
     * @exception SQLException if the columnLabel is not valid; if a database access error occurs;
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateClob(String columnLabel,  Reader reader) throws SQLException;
   /**
     * Updates the designated column using the given <code>Reader</code>
     *
     * The data will be read from the stream
     * as needed until end-of-stream is reached.  The JDBC driver will
     * do any necessary conversion from UNICODE to the database char format.
     *
     * <p>
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <P><B>Note:</B> Consult your JDBC driver documentation to determine if
     * it might be more efficient to use a version of
     * <code>updateNClob</code> which takes a length parameter.
     *
     * <p>
     *  使用给定的<code> Reader </code>更新指定的列
     * 
     *  将根据需要从流中读取数据,直到达到流末尾JDBC驱动程序将执行从UNICODE到数据库字符格式的任何必要的转换
     * 
     * <p>
     * updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新数
     * 据库。
     * 
     *  <P> <B>注意：</B>请查看您的JDBC驱动程序文档,以确定是否使用一个版本的<code> updateNClob </code>
     * 
     * 
     * @param columnIndex the first column is 1, the second 2, ...
     * @param reader An object that contains the data to set the parameter value to.
     * @throws SQLException if the columnIndex is not valid;
    * if the driver does not support national
     *         character sets;  if the driver can detect that a data conversion
     *  error could occur; this method is called on a closed result set,
     * if a database access error occurs or
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateNClob(int columnIndex,  Reader reader) throws SQLException;

    /**
     * Updates the designated column using the given <code>Reader</code>
     * object.
     * The data will be read from the stream
     * as needed until end-of-stream is reached.  The JDBC driver will
     * do any necessary conversion from UNICODE to the database char format.
     *
     * <p>
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the <code>updateRow</code> or
     * <code>insertRow</code> methods are called to update the database.
     *
     * <P><B>Note:</B> Consult your JDBC driver documentation to determine if
     * it might be more efficient to use a version of
     * <code>updateNClob</code> which takes a length parameter.
     *
     * <p>
     *  使用给定的<code> Reader </code>对象更新指定的列。将根据需要从流中读取数据,直到达到流末尾JDBC驱动程序将执行从UNICODE到数据库字符格式的任何必要的转换
     * 
     * <p>
     * updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用<code> updateRow </code>或<code> insertRow </code>方法来更新数
     * 据库。
     * 
     *  <P> <B>注意：</B>请查看您的JDBC驱动程序文档,以确定是否使用一个版本的<code> updateNClob </code>
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.  If the SQL AS clause was not specified, then the label is the name of the column
     * @param reader An object that contains the data to set the parameter value to.
     * @throws SQLException if the columnLabel is not valid; if the driver does not support national
     *         character sets;  if the driver can detect that a data conversion
     *  error could occur; this method is called on a closed result set;
     *  if a database access error occurs or
     * the result set concurrency is <code>CONCUR_READ_ONLY</code>
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.6
     */
    void updateNClob(String columnLabel,  Reader reader) throws SQLException;

    //------------------------- JDBC 4.1 -----------------------------------


    /**
     *<p>Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object and will convert from the
     * SQL type of the column to the requested Java data type, if the
     * conversion is supported. If the conversion is not
     * supported  or null is specified for the type, a
     * <code>SQLException</code> is thrown.
     *<p>
     * At a minimum, an implementation must support the conversions defined in
     * Appendix B, Table B-3 and conversion of appropriate user defined SQL
     * types to a Java type which implements {@code SQLData}, or {@code Struct}.
     * Additional conversions may be supported and are vendor defined.
     * <p>
     *  p>检索此<code> ResultSet </code>对象的当前行中的指定列的值,并且如果支持转换,则将从列的SQL类型转换为请求的Java数据类型如果转换不支持或为类型指定null,则会抛出<code>
     *  SQLException </code>。
     * p>
     * 实现必须至少支持附录B,表B-3中定义的转换,并将适当的用户定义的SQL类型转换为实现{@code SQLData}或{@code Struct}的Java类型。可能支持其他转换并且是供应商定义的
     * 
     * 
     * @param <T> the type of the class modeled by this Class object
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param type Class representing the Java data type to convert the designated
     * column to.
     * @return an instance of {@code type} holding the column value
     * @throws SQLException if conversion is not supported, type is null or
     *         another error occurs. The getCause() method of the
     * exception may provide a more detailed exception, for example, if
     * a conversion error occurs
     * @throws SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.7
     */
     public <T> T getObject(int columnIndex, Class<T> type) throws SQLException;


    /**
     *<p>Retrieves the value of the designated column in the current row
     * of this <code>ResultSet</code> object and will convert from the
     * SQL type of the column to the requested Java data type, if the
     * conversion is supported. If the conversion is not
     * supported  or null is specified for the type, a
     * <code>SQLException</code> is thrown.
     *<p>
     * At a minimum, an implementation must support the conversions defined in
     * Appendix B, Table B-3 and conversion of appropriate user defined SQL
     * types to a Java type which implements {@code SQLData}, or {@code Struct}.
     * Additional conversions may be supported and are vendor defined.
     *
     * <p>
     *  p>检索此<code> ResultSet </code>对象的当前行中的指定列的值,如果支持转换,则将从列的SQL类型转换为请求的Java数据类型如果转换不支持或为类型指定null,则会抛出<code>
     *  SQLException </code>。
     * p>
     * 实现必须至少支持附录B,表B-3中定义的转换,并将适当的用户定义的SQL类型转换为实现{@code SQLData}或{@code Struct}的Java类型。可能支持其他转换并且是供应商定义的
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS clause.
     * If the SQL AS clause was not specified, then the label is the name
     * of the column
     * @param type Class representing the Java data type to convert the designated
     * column to.
     * @param <T> the type of the class modeled by this Class object
     * @return an instance of {@code type} holding the column value
     * @throws SQLException if conversion is not supported, type is null or
     *         another error occurs. The getCause() method of the
     * exception may provide a more detailed exception, for example, if
     * a conversion error occurs
     * @throws SQLFeatureNotSupportedException if the JDBC driver does not support
     * this method
     * @since 1.7
     */
     public <T> T getObject(String columnLabel, Class<T> type) throws SQLException;

    //------------------------- JDBC 4.2 -----------------------------------

    /**
     * Updates the designated column with an {@code Object} value.
     *
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the {@code updateRow} or
     * {@code insertRow} methods are called to update the database.
     *<p>
     * If the second argument is an {@code InputStream} then the stream must contain
     * the number of bytes specified by scaleOrLength.  If the second argument is a
     * {@code Reader} then the reader must contain the number of characters specified
     * by scaleOrLength. If these conditions are not true the driver will generate a
     * {@code SQLException} when the statement is executed.
     *<p>
     * The default implementation will throw {@code SQLFeatureNotSupportedException}
     *
     * <p>
     *  使用{@code Object}值更新指定的列
     * 
     *  updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用{@code updateRow}或{@code insertRow}方法来更新数据库
     * p>
     * 如果第二个参数是{@code InputStream},那么流必须包含由scaleOrLength指定的字节数。
     * 如果第二个参数是{@code Reader},则读者必须包含由scaleOrLength指定的字符数。如果这些条件不是真的,驱动程序将在执行语句时生成{@code SQLException}。
     * p>
     *  默认实现会抛出{@code SQLFeatureNotSupportedException}
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param x the new column value
     * @param targetSqlType the SQL type to be sent to the database
     * @param scaleOrLength for an object of {@code java.math.BigDecimal} ,
     *          this is the number of digits after the decimal point. For
     *          Java Object types {@code InputStream} and {@code Reader},
     *          this is the length
     *          of the data in the stream or reader.  For all other types,
     *          this value will be ignored.
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is {@code CONCUR_READ_ONLY}
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not
     * support this method; if the JDBC driver does not support the specified targetSqlType
     * @see JDBCType
     * @see SQLType
     * @since 1.8
     */
     default void updateObject(int columnIndex, Object x,
             SQLType targetSqlType, int scaleOrLength)  throws SQLException {
        throw new SQLFeatureNotSupportedException("updateObject not implemented");
    }

    /**
     * Updates the designated column with an {@code Object} value.
     *
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the {@code updateRow} or
     * {@code insertRow} methods are called to update the database.
     *<p>
     * If the second argument is an {@code InputStream} then the stream must
     * contain number of bytes specified by scaleOrLength.  If the second
     * argument is a {@code Reader} then the reader must contain the number
     * of characters specified by scaleOrLength. If these conditions are not
     * true the driver will generate a
     * {@code SQLException} when the statement is executed.
     *<p>
     * The default implementation will throw {@code SQLFeatureNotSupportedException}
     *
     * <p>
     *  使用{@code Object}值更新指定的列
     * 
     *  updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用{@code updateRow}或{@code insertRow}方法来更新数据库
     * p>
     * 如果第二个参数是{@code InputStream},那么流必须包含由scaleOrLength指定的字节数。
     * 如果第二个参数是{@code Reader},则读者必须包含由scaleOrLength指定的字符数。如果这些条件不是true,当执行语句时,驱动程序将生成{@code SQLException}。
     * p>
     *  默认实现会抛出{@code SQLFeatureNotSupportedException}
     * 
     * 
     * @param columnLabel the label for the column specified with the SQL AS
     * clause.  If the SQL AS clause was not specified, then the label is
     * the name of the column
     * @param x the new column value
     * @param targetSqlType the SQL type to be sent to the database
     * @param scaleOrLength for an object of {@code java.math.BigDecimal} ,
     *          this is the number of digits after the decimal point. For
     *          Java Object types {@code InputStream} and {@code Reader},
     *          this is the length
     *          of the data in the stream or reader.  For all other types,
     *          this value will be ignored.
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is {@code CONCUR_READ_ONLY}
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not
     * support this method; if the JDBC driver does not support the specified targetSqlType
     * @see JDBCType
     * @see SQLType
     * @since 1.8
     */
    default void updateObject(String columnLabel, Object x,
            SQLType targetSqlType, int scaleOrLength) throws SQLException {
        throw new SQLFeatureNotSupportedException("updateObject not implemented");
    }

    /**
     * Updates the designated column with an {@code Object} value.
     *
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the {@code updateRow} or
     * {@code insertRow} methods are called to update the database.
     *<p>
     * The default implementation will throw {@code SQLFeatureNotSupportedException}
     *
     * <p>
     *  使用{@code Object}值更新指定的列
     * 
     *  updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用{@code updateRow}或{@code insertRow}方法来更新数据库
     * p>
     * 默认实现会抛出{@code SQLFeatureNotSupportedException}
     * 
     * 
     * @param columnIndex the first column is 1, the second is 2, ...
     * @param x the new column value
     * @param targetSqlType the SQL type to be sent to the database
     * @exception SQLException if the columnIndex is not valid;
     * if a database access error occurs;
     * the result set concurrency is {@code CONCUR_READ_ONLY}
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not
     * support this method; if the JDBC driver does not support the specified targetSqlType
     * @see JDBCType
     * @see SQLType
     * @since 1.8
     */
    default void updateObject(int columnIndex, Object x, SQLType targetSqlType)
            throws SQLException {
        throw new SQLFeatureNotSupportedException("updateObject not implemented");
    }

    /**
     * Updates the designated column with an {@code Object} value.
     *
     * The updater methods are used to update column values in the
     * current row or the insert row.  The updater methods do not
     * update the underlying database; instead the {@code updateRow} or
     * {@code insertRow} methods are called to update the database.
     *<p>
     * The default implementation will throw {@code SQLFeatureNotSupportedException}
     *
     * <p>
     *  使用{@code Object}值更新指定的列
     * 
     *  updater方法用于更新当前行或插入行中的列值updater方法不更新底层数据库;而是调用{@code updateRow}或{@code insertRow}方法来更新数据库
     * 
     * @param columnLabel the label for the column specified with the SQL AS
     * clause.  If the SQL AS clause was not specified, then the label is
     * the name of the column
     * @param x the new column value
     * @param targetSqlType the SQL type to be sent to the database
     * @exception SQLException if the columnLabel is not valid;
     * if a database access error occurs;
     * the result set concurrency is {@code CONCUR_READ_ONLY}
     * or this method is called on a closed result set
     * @exception SQLFeatureNotSupportedException if the JDBC driver does not
     * support this method; if the JDBC driver does not support the specified targetSqlType
     * @see JDBCType
     * @see SQLType
     * @since 1.8
     */
    default void updateObject(String columnLabel, Object x,
            SQLType targetSqlType) throws SQLException {
        throw new SQLFeatureNotSupportedException("updateObject not implemented");
    }
}
